(3b 5) (-2b-5) (b-4)
I assume this question would be:
= (3b + 5) + (-2b - 5) + (b - 4)
= 3b +5 -2b - 5 + b - 4
= 3b -2b + b + 5 - 5 - 4
= 2b - 4
2b = 4
b = 4/2
b = 2
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