Solve by addition or substitution y=4x-4y 3x+2y=11
Help.

Question

Solve by addition or substitution y=4x-4y  3x+2y=11 
Help.

anonymous · Answer

multiply 3x+2y=11 all by -2 and line it up with y=4x-4y. then solve for one variable and then use replacement.

anonymous · Answer

so plug in -2 for x and y and multiply 11 as well by -2?

anonymous · Answer

everything by -2(...)

anonymous · Answer

@Ben103 We already went through a similar question like this. This just contains different numbers.

unklerhaukus · Answer

$$y=4x−4y\qquad\qquad3x+2y=11$$
 
a different method would be to 
solve the first equation for x
(by taking the y terms to the left and dividing by four)

then substitute x into  the second equation

anonymous · Answer

So far I have (4x-44)-(-6x+-4x)=(-22)-44. Is that good so far?

unklerhaukus · Answer

are you sure you have the question right?

unklerhaukus · Answer

i dont think there are nice solutions to this system

anonymous · Answer

I multiplied -2 by (3x+2y) and 11 and got -6x+-4x=-22

anonymous · Answer

and then lined it up with y=4x-4y

anonymous · Answer

You don't use the elimination method in this one although it still works. YOu use the substitution method because one of the equations has y as the subject which makes your life easier when solving using substitution.