y = -x + 3
y - 3 = -x
-y + 3 = x
Therefore x = 3 - y
y-x=3
(0, -3)
X+3=Y X=Y-3 X-Y=-3
the Y in the sentence X plus Y equals 5 is Y=3 or 2 if the X is 2 or 3
It is x = 2 and y = 1
Y = x - 7
Symmetric Property of Addition
x=4 y=x+3 y=4+3 y=7
x = -3, y = 7
x = -2 and y = 3
(x, y) = (-3, -3) or (3, 3)
x = 5, y = -2