Answer:
I think the answer probably 22.8
80in 2
Step-by-step explanation:
Sally would have 8 diamonds left
7x - 15 = 4x - 12
3x - 15 = -12
3x = 3
x = 1
y = 7(1) - 15
y = 7 - 15
y = -8
(1, -8)
