Question

x+y=-2, 2x-2y=-8 (-3 1) substitution method

Answer 1

x=-3, y=1.
plug it in.
-3+1=-2,
2(-3)-2(1)=-8

what are you supposed to do?

Answer 2

x+y=0
3x-3y=0
(-1,1)
my answer is
-1=0,-6=0 is that correct ??

Answer 3

i dont understand what you did..

Answer 4

ok this is the question
x+y=0
3x-3y=0
(-1,1)
i have the answer for it can you solve it and i will check if we have the same answer