Answer:
3x + y = - 9
Explanation:
y - 6 = -3 (x + 5)
Distribute the -3
y - 6 = -3x - 15
Add 3x to both sides
3x + y - 6 = -15
Add 6 to both sides
-------------------
A = 3
B = 1
C = -9
ok
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