y=2x-2 y=x+2

I'm not sure what's your question.

If you want to solve x, you could set
2x-2=x+2 and then solve

y=2x-2
y=x+2

y=y

2x-2=x+2

2x-x=2+2

x=4

y=2x-2
y=2*4-2=8-2=6

y=x+2

y=4+2=6

x=4

y=6

lo8o