Answer: x = 7, y = -3
Step-by-step explanation:
2x - y = 17
x - y = 10 —> x = y + 10
2(y + 10) - y = 17
2y + 20 - y = 17
y + 20 = 17
-20 -20
y = -3
x = y + 10
x = (-3) + 10
x = 7
