Question 783347
x+2y=2   equation 1
x-y=8    equation 2

x= y+8   equation 3

x+2y=2
(y+8)+2y=2
3y=2-8
3y= -6
------
3   3
y= -2


x-y= 8
x+6=8
x=8-6
x=2