Answer :
y = 2x - 10
x - y = 7
x - (2x - 10) = 7
-x - 10 = 7
+ 10 + 10
-x = 17
x = -17
-17 + y = 7
+ 17 + 17
y = 24
(x, y) = (-17, 24)
x - y = 7
x - (2x - 10) = 7
-x - 10 = 7
+ 10 + 10
-x = 17
x = -17
-17 + y = 7
+ 17 + 17
y = 24
(x, y) = (-17, 24)