Problem: x-y=-3 x+y=9
help me what this
x - y = -3
x + y = 9
x - y = -3
x - y + y = y - 3
x = y - 3
x + y = 9
(y - 3) + y = 9
2y - 3 = 9
2y - 3 + 3 = 9 + 3
2y = 12
2y/2 = 12/2
y = 6
x - y = -3
x - 6 = -3
x - 6 + 6 = -3 + 6
x = 3
Check.
x - y = -3
3 - 6 = -3
-3 = -3
x + y = 9
3 + 6 = 9
9 = 9
Answer: x = 3, y = 6