Answer:
b=4/3
Explanation:
Distribute first
6b - 15 = 4 - 3b - 7
6b - 15 = -3b -3, add 3b to both sides
9b - 15 = -3, add 15 to both sides
9b = 12, divide both sides by 9
b = 12/9 = 4/3
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