Now we look at solving simultaneous equations by a method of substitution. This involves re-arranging one equation to isolate a variable and then substituting this into the other equation.
Пікірлер: 295
@JavanTucker5994 ай бұрын
Still can't get it...
@DakotaPeters-kp9ux3 ай бұрын
Your cooked bro
@naimali29813 ай бұрын
@@DakotaPeters-kp9ux😂
@user-qp9wq2ct2q3 ай бұрын
@@DakotaPeters-kp9uxfr (I can’t do them either)
@asmahussein70563 ай бұрын
You and me both 😢
@xvxgaryalex3 ай бұрын
H7h7f f f
@4espaverse Жыл бұрын
This method was surprisingly easier than what my teacher taught me 💀
@arthurmarston7128 Жыл бұрын
The teachers are always giving hard methods
@emiliaa850 Жыл бұрын
No really though
@meandmypets-le6lf Жыл бұрын
Cause teachers are shit 😂
@mercyfayehuno.555611 ай бұрын
Exactly
@ecc000610 ай бұрын
@@arthurmarston7128theyre just shit at teaching
@Mother_Lol3 жыл бұрын
Thank you so much for the explanation. This was a really difficult concept for me to understand. Thank u again for a great explanation 😀
@jendisipison9 ай бұрын
.
@JardeOri-kc8ov8 ай бұрын
Even for me
@ivanexell-uz4mv4 ай бұрын
@@JardeOri-kc8ov what do you mean even for me? You think you’re Jimmy neutron? 😂
@ho-ohkay2 ай бұрын
Me too, I get it now
@Unique7_72 ай бұрын
Exam tomorrow and i still dont know how to do them
@Freedomtospeak18 ай бұрын
Easy solve by substitution. Original New equation X + 3y = 11. -4x-12y = -44 4x - 7y = 6. 4x- 7y = 6 Mult top row by -4 -------------- - 19y= -38 Divide both sides by -19 Now y = 2. Plug in 2 for y and …. X+ 3(2) = 11 X + 6 = 11 -> subt 6 from both sides leaving X = 5 Plug x= 5 and y = 2 into both original equations as proof
@Scope20103 ай бұрын
Nice
@elieelainor9821 Жыл бұрын
BRO'S LAUGH STUNNED MY HEART, NEVER LEAVING MATHS SIDE AGAIN
@zainabhassan3191 Жыл бұрын
Ahhh, that just clarified all my confusions! Thanks alot for this, this video was really helpful🤧✨
@ritz24522 жыл бұрын
There is however a different solution to x+3y and 4x-7y.To make x the subject of the formulae of the first equation we get x=11-3y.Therefor when substituting x into the second equation we get 4(11-3y)-7y=6.After that we multiply everything in the bracket with 4.So after multiplying we get 44-12y-7y=6.We then group like terms which require transposing so after grouping like terms we get -12y-7y=6-44.After simplifying this equation we get -19y=-38.We then divide by 19 at both sides so 19y divided by 19y will answer with y.-38 divided by 19 gives us -2.So y=-2.To find x we substitute y in the first equation and therefor x+3(-2)=11.We then simplify the equation which will be x+-6=11.We then transpose the 6 to the 11 to group like terms.So then x=11+6 (The sign of the transposed value turns into the opposite sign.).So then x=17.To test if we are correct use any of the equations like x=3y=11.Simplify in the expression we get 17+3(-2)=11.However both answers are correct.
@itsspeed73012 жыл бұрын
;-;
@RayansCompilation10 ай бұрын
Yeah you are correct
@grassytramtracks10 ай бұрын
y is not -2, -19y=-38, so -y=-2 and y=2, and you got rid of the minus on the left, but not on the right, which you can't do, you need to un-minus both sodes
@grassytramtracks10 ай бұрын
@@RayansCompilationno the video was right
@Nobody_Arco2 ай бұрын
Wont y become negative 2 cause positive 44 got switched to the other side so 6 minus negative 44 equals to negative 38 so help
@TadiwaMukaro-qh1unАй бұрын
No because sir didn't switch 44 he switched -12y and -7y
@en-thetics176 Жыл бұрын
Thank you soo much you saved my day because tomorrow is my exam and my concept wasn't clear but you saved my dayyy
@heavydutysolutionszambiali76332 ай бұрын
Did you pass?
@aryankannan4893 жыл бұрын
You’ve just made my life so much better
@ayanpro8457 Жыл бұрын
Same here
@techiester83113 жыл бұрын
The world needs such people
@nasraahmed17068 ай бұрын
What a life saver you teach better than my teacher thank you for understanding me 😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊
@rogerwatson72883 жыл бұрын
Love your voice, love your explanation. Thanks so much!!
@mad_65193 ай бұрын
Thank you so much. The reason I'm only really good at sciences (including comp sci) is because I only remember to do things if I know why. I couldn't remember anything about differentiation by first principles if I didn't know what we were trying to achieve, and just as such you have explained *why* we do what we do
@craniax28204 жыл бұрын
Thanks a lot bro! It really helped a lot... Keep up the Great Work!
@reginanamvula-nt4de2 ай бұрын
How did sir get 38
@rereoiАй бұрын
12y+7y =19y 44-6=38 38÷19 = 2 Ig
@fatoumattajanneh3114 Жыл бұрын
Thank you so much 🥰💘 this topic is very hard to understand.But now I understand
@yolandankosana50312 жыл бұрын
Thank you so much!!! This was so helpful!! 💕💫
@abdulrahmansalaudeen4935 Жыл бұрын
Thank you so much for this explanation it has being a very difficult topic for me to understand again thank you
@user-hf2wd8hj1s9 ай бұрын
how is -12y-7y = positive 19? shouldnt it equal -19? But even without the negative next to the 12y it would be positive 5. or maybe 12y minus negative 7y, which does equal +19?
@projectprada-vf1tl4 ай бұрын
when u mnus with a negative it becomes bigger
@florencehenry764 ай бұрын
Like, it's wrong
@allahthegod3 ай бұрын
when you put a number from one side of an equals (=) sign to the other .. you change it from positive to negative. or negative to positive.
@starGirl-dl1rx3 ай бұрын
Exactly
@lighthouseelectrical2 ай бұрын
-×-=+
@syedmohammadwasi10132 жыл бұрын
Thanks! Needed a quick recap, and this provided.
@humanarmy93393 жыл бұрын
Tomorrow is my paper thank you soon much I understood the question
@victorianameneamupolo2367 Жыл бұрын
Thank you very much.Your explanations are quite clear and easy to understand.
@luhohnel9 ай бұрын
Thank your for this short and concise video. Definitely leaving a like
@Duckie.3011 Жыл бұрын
Bro thank you bro I was having trouble how to do it as a grade 7 student and I get it after this video thank you so much after a very long time I finnally get it.❤❤
@redxmoon495 Жыл бұрын
Thanks you ,you so great at teaching I understand everything 😂
@lifeofwingy3 жыл бұрын
Thank you so much😊🥺💯. This is my weak area in maths and I can now do it better😊🙏
@UzumakiNarutoHokage7th3 ай бұрын
I can't understand sir, can u help me?
@davidotoo-ri5om6 ай бұрын
that was easy for the first time willing to see the next one in I think it will be a difficult one if there is
@eunwoovrs17152 жыл бұрын
ur voice makes me melt ❤️🔥
@shenikalogan23453 жыл бұрын
Thank you soo much you are a life saver
@shavoniilloyd78253 жыл бұрын
I have learned nothing the words on the screen is hiding the equation and I'm not see the whole equation
@user-qb4su7xw3x3 ай бұрын
Thank you so much for helping me. I understand better now..
@Tomik9784 жыл бұрын
YOU HAVE A BIG FUTURE
@emmanueladdiah9877 Жыл бұрын
Love the handwriting!
@sakinarizvi7149 ай бұрын
He teaches better than my techer with 15 years experience
@oonot67332 ай бұрын
You my friend are the goat I can't tell you how useful this was much love❤
@josephinabukelwakekana87997 ай бұрын
Thank you Sir, Everything well explained!! You made things very easy for me
@oneshotff29032 жыл бұрын
You know what you teach math very well.bro full support to you thank you so much
@stars._.37010 ай бұрын
When I was in class, my brain was in loops of multiverses
@anmollifestyle26692 ай бұрын
Thank you today is my math exam and now I understand how to solve it thx
@mariamasillah7495 Жыл бұрын
Thanks 👍 for making me understand 😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊🎉🎉🎉🎉🎉🎉🎉🎉🎉🎉🎉🎉🎉🎉🎉🎉🎉🎉🎉🎉
@hannahadejoh67414 жыл бұрын
Thanks you're a life saver
@djtjts90715 ай бұрын
Ty bro cause i was tweaking in class
@TCmadethisBeats Жыл бұрын
Exam tmrw morning. Only started studying now, it’s 10:30pm. Thanks for the clear and fast explanation lol 🤣
@M3sh09 ай бұрын
omg same i’ve a math exam tomorrow but it’s 10:15 rn
@rereoi7 ай бұрын
@@M3sh0 10:28pm for me 😂
@jap4220 Жыл бұрын
When u wrote 6 instead of 2 I lost hope for a moment 😅
@heavenlykizzy43442 жыл бұрын
Thank you so much you the best teacher ever.
@nninggsaee5 ай бұрын
Sir with all respect if u were my teacher I would die because your voice is giving me so many butterflies. My heart go boom boom
@adamzeiada29838 ай бұрын
thanks man my teacher tried to explain it to me in every way but i still wouldn't get it thank you:)
@katlegobokaba79452 жыл бұрын
On equations 2 isn't y=3x+7
@kfjfkeofitorhf9520 Жыл бұрын
Y===3X+7= 3X=7-y= 3X=6 X=2 6++7==13==(y)
@aidenisakronk59532 жыл бұрын
lifesaver my teacher is kinda Dogshit and you really came in clutch before my exam
@gonzaalex90452 жыл бұрын
Waw you are such a good teacher thanks man
@tejasveenunkoo85122 жыл бұрын
tyssmmm, ive a maths test tomorrow and ngl this vid really helped
@LynetteLovell Жыл бұрын
Thank you! Keep up the good work 🙂
@saachijain35593 жыл бұрын
Thank you so much, i understood it very well. Wow, 8th grade math is tough. Anyways thank you again
@yutheebanmithunash8840 Жыл бұрын
U r awesome bro
@ferhatrayanachiou65772 жыл бұрын
what if the coefficient is not one but 2 or three?
@hisky.2 жыл бұрын
Then just simplify it
@kimaya14122 жыл бұрын
"2x=11-3y" divide bothsides by 2 x= 5.5-1.5y (THIS IS MY MADE UP EXAMPLE THXS) edit; "2y=3x-7" divide both sides y=1.5x-3.5 so yh (THIS IS MY MADE UP EXAMPLE THXS SO DONT USE TO SOLVE THIS EXACT EQUATION THX LUVS)
@stevenscottoddballz2 жыл бұрын
2:43 Which is it? You said Y=5, then you said X=5, Y=2.
@mikkelhoxer9071 Жыл бұрын
He misspoke
@rejoiceemeka-gberemakor3624 жыл бұрын
love it made it so much clearer now thanks LOVE IT!!!!!!
@feovlogssl95123 ай бұрын
Thanks this is so easy and understandable ❤
@BerverlyMaguma25 күн бұрын
Thank you for the explanation I appreciate it and l really do understand everything thank you
@natureshorts5818 Жыл бұрын
Thanks This Helped :)
@ElBonito_147 ай бұрын
A much better and faster method of doing this. Mucho Gracias
@hamsavarrushineapsaravananmoe Жыл бұрын
very helpful for me , tqsm 🙏
@DavidsonAgbeyegbe-re3ez6 ай бұрын
Aren't there exercises but this was a very inspiring and important video, at least i got to know how to solve simultaneous equation
@FessyIpinge3 ай бұрын
Life saver I past my math test😂
@Yescauseidgas5 ай бұрын
I honestly find elimination way easier I think i just didnt understand or listen when my teacher talked about substitution
@benita-elixiroba79707 күн бұрын
Thank you teacher.
@mbakori10 Жыл бұрын
Thank you so much 😻❤️❤️
@nsikakakpan11994 ай бұрын
thank you very much for the tutoring i now know the substitution easily 😀 😃
@HeadsetManАй бұрын
Can’t you plug Y=2 into the first line making it become 6 and then make 6 go to the other side and make it negative 6 and then subtract eleven w -6 to get 5??
@nkt.112 жыл бұрын
3:37 why didn’t you rearrange equation 3 the same way you arranged it in the first example, just curious
@eunwoovrs17152 жыл бұрын
i was wondering the same thinf
@twiliverse Жыл бұрын
Because then it wouldn't work. Using equation II, we have solved the value of x. Later on, the equation we had rearranged will have to be used. We put the value of x in the re-arranged equation I and we get the value of y. Hope this helped!
@hadeejanilafer21834 жыл бұрын
Thanks a lot.. you helped me a lot with my math wrk
@user-yq6dz4nn4d Жыл бұрын
❤❤❤❤❤❤❤❤❤❤❤ I looooovvvvvveeeee this video 😊 The way you explained everything step by step is excellently easier and better than what my teachers have ever explained 😊❤ 👍keep up the good work 👍👍
@AEdits21 Жыл бұрын
You earned a new subscriber
@eldarabbas37242 жыл бұрын
Thanks a lot! 👍😀👌
@yousufsalman92158 ай бұрын
brilliant explaining bro❤
@tinamatilanisi92166 ай бұрын
Thank you very much for the wonderful explanation😔🙏🙏
@Thunderbolt-uo-5jr3 күн бұрын
Thank u a lot bri❤
@vIP.bLACK4442 жыл бұрын
Thanks a lot this tutorial works
@ayenidolapo6944 Жыл бұрын
Thank you so much may God bless you 🙏
@user-fy6iz4je9m9 ай бұрын
im confused how did he get 19x-19 where did the 19 come from
@gregoriusnathankurniawan23483 ай бұрын
Thank you so much, you saved my final test grades
@Meme_se_mazaq244 ай бұрын
Thanks for making it easier🎉
@wantaball117 Жыл бұрын
this is why i need to drop out of maths, i still dont understand how they randomly grab numbers out of nowhere
@user-wf9ek7yv6d10 ай бұрын
hahhaahhaha,broo you dont know wht iscoming in 2-3 years
@diamondnation3172 жыл бұрын
What about when there are no isolated variables
@dramatic5105 Жыл бұрын
Thank youu man this help me so much and I can't believe I actually understood it :-O
@shahzar6152 Жыл бұрын
How 3 comes after re arranging equation number1.
@zkuang2 ай бұрын
Thanks, it does help.
@obiwanjacobi94615 ай бұрын
why does 4 become 44?
@Amal4iiii4 ай бұрын
4 times 11 is 44
@mimilive96 Жыл бұрын
💐💐💐💐💐💐💐
@abdulahiabdirahman-ze1eo Жыл бұрын
question 1 y=-2 not y=2
@grassytramtracks10 ай бұрын
No, it's 2. He went in one step but I'll break it down: from 44-7y-12y=6, -44 makes it -7y-12y=-38 and add the y's to make -19y=-38 and then you can change the signs to 19y=38
@isha70793 жыл бұрын
Thanks alot , your voice is very reassuring
@TheGhostofSparta95 ай бұрын
I got a Test on this tmr.
@TsepisoMabila4 ай бұрын
Solve the simultaneous equation,3x_2y=19 X+y=3
@user-uo9yp7qg2e10 ай бұрын
The first mistake you did really scared me
@cpextremecraftgaming48872 жыл бұрын
It just made me even more confused
@sophiehind59772 жыл бұрын
same
@attahattah746010 ай бұрын
thank you sir am very greateful
@shemarhalley2283 жыл бұрын
I cant see the 4 step the words on the screen is preventing me from seeing