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0=6m+7(7m+9)
We move all terms to the left:
0-(6m+7(7m+9))=0
We add all the numbers together, and all the variables
-(6m+7(7m+9))=0
We calculate terms in parentheses: -(6m+7(7m+9)), so:We get rid of parentheses
6m+7(7m+9)
We multiply parentheses
6m+49m+63
We add all the numbers together, and all the variables
55m+63
Back to the equation:
-(55m+63)
-55m-63=0
We move all terms containing m to the left, all other terms to the right
-55m=63
m=63/-55
m=-1+8/55
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