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76.50=0.45(b)
We move all terms to the left:
76.50-(0.45(b))=0
We add all the numbers together, and all the variables
-(+0.45b)+76.50=0
We add all the numbers together, and all the variables
-(+0.45b)+76.5=0
We get rid of parentheses
-0.45b+76.5=0
We move all terms containing b to the left, all other terms to the right
-0.45b=-76.5
b=-76.5/-0.45
b=+170
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