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It is: 19b+7b = 26b
7b + 15= -34 First, 7b + 15 - 15 = -34 - 15 So, 7b = -49 Then, 7b/7 = -49/7 And finally, b = -7 So b = -7
7b-7 = 0
(-a-7b+5)4ab
5.8571