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31=5(3b+10)
We move all terms to the left:
31-(5(3b+10))=0
We calculate terms in parentheses: -(5(3b+10)), so:We get rid of parentheses
5(3b+10)
We multiply parentheses
15b+50
Back to the equation:
-(15b+50)
-15b-50+31=0
We add all the numbers together, and all the variables
-15b-19=0
We move all terms containing b to the left, all other terms to the right
-15b=19
b=19/-15
b=-1+4/15
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