Question

can someone help solve this by substitution? Whenever I do it the x's or y's always cancel eachother out.

2x-y=5
-2x+y=7

show by steps plz i dont just want the answer.

Answer 1

no solution

Answer 2

thats what i simply put?

Answer 3

that is because they are parallel

Answer 4

Well,\[-2x+y=-(2x-y)\] so you are trying to show that 5 = -7

Answer 5

1: y=-5+2x
2:-2x+y=7

subs. 1 into 2
-2x+(-5+2x)=7
-2x-5+2x=7
-5=7