Question

Determine whether (-7, 2) is a solution to the system:
2x + 5y = −4
3x - y = 11

Answer 1

x = -7
y = 2

2 x (-7) + 5 x 2 = -4
3 x (-7) - 2 = 11

-14 + 10 = -4
-21 - 2 = 11

-4 = -4 (yes)
-23 = 11 (no)

Answer: (-7, 2) is not a solution