Answer:
14) C (-2, 4)
15) D (-3, -3)
Step-by-step explanation:
-6x + 4y = 28
6x + 9y = 24
4y = 28 + 6x
y = 7 + 1.5x
6x + 9(7 + 1.5x) = 24
6x + 63 + 13.5x = 24
19.5x + 63 = 24
19.5x = -39
x = -2
-6(-2) + 4y = 28
12 + 4y = 28
4y = 16
y = 4
____________
4x - 4y = 0
-4x + 3y = 3
4x = 4y
x = y
-4(y) + 3y = 3
-4y + 3y = 3
-1y = 3
y = -3
4x - 4(-3) = 0
4x + 12 = 0
4x = -12
x = -3
