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5b+11.2=68.7
We move all terms to the left:
5b+11.2-(68.7)=0
We add all the numbers together, and all the variables
5b-57.5=0
We move all terms containing b to the left, all other terms to the right
5b=57.5
b=57.5/5
b=11+2.5/5
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