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15(m+10)-129=3(5m+7)
We move all terms to the left:
15(m+10)-129-(3(5m+7))=0
We multiply parentheses
15m-(3(5m+7))+150-129=0
We calculate terms in parentheses: -(3(5m+7)), so:We add all the numbers together, and all the variables
3(5m+7)
We multiply parentheses
15m+21
Back to the equation:
-(15m+21)
15m-(15m+21)+21=0
We get rid of parentheses
15m-15m-21+21=0
We add all the numbers together, and all the variables
=0
m=0/1
m=0
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