Answer:
126
Step-by-step explanation:
a = 9b
divide each side by 9
= b
3x - y = 8
y = 3x - 8
y = 3*2.5 - 8 = -0.5 --> (2.5, -0.5)
y = 3*5 - 8 = 7 --> (5, 7)
Answer C is correct.
-5,3