Question

X - 2y = 9; x - y = 3

Answer 1

x=3+y⇒3 equation

Substitute the third equation in the first equation. In the place of x it means you will plug in y+3.

`(y+3)-2y=9\\y-2y+3=9\\-y=9-3\\y=-6`

To get x use the third equation by plugging in value -6 in the place of y

`x=3+(-6)\\\\x=3-6\\x=-3`

(-3,-6)

I hope I helped you