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3+15b=13+15b-10
We move all terms to the left:
3+15b-(13+15b-10)=0
We add all the numbers together, and all the variables
15b-(15b+3)+3=0
We get rid of parentheses
15b-15b-3+3=0
We add all the numbers together, and all the variables
=0
b=0/1
b=0
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