x=y
X+3=Y X=Y-3 X-Y=-3
x=4 y=x+3 y=4+3 y=7
3
y = -x + 3 y - 3 = -x -y + 3 = x Therefore x = 3 - y
6
(x, y) = (-3, -3) or (3, 3)
It is x = 2 and y = 1
It depends on how y depends on x.
y-x=3
x= z2 - 3
x - y = -3 -y = -x - 3 y = x + 3 y-int. = 3 x-int. = -3