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42=7(7+m)
We move all terms to the left:
42-(7(7+m))=0
We add all the numbers together, and all the variables
-(7(m+7))+42=0
We calculate terms in parentheses: -(7(m+7)), so:We get rid of parentheses
7(m+7)
We multiply parentheses
7m+49
Back to the equation:
-(7m+49)
-7m-49+42=0
We add all the numbers together, and all the variables
-7m-7=0
We move all terms containing m to the left, all other terms to the right
-7m=7
m=7/-7
m=-1
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