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77.50b=1007.50
We move all terms to the left:
77.50b-(1007.50)=0
We add all the numbers together, and all the variables
77.50b-(1007.5)=0
We add all the numbers together, and all the variables
77.50b-1007.5=0
We move all terms containing b to the left, all other terms to the right
77.50b=1007.5
b=1007.5/77.50
b=13
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