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6(m-7)=8(m-9)
We move all terms to the left:
6(m-7)-(8(m-9))=0
We multiply parentheses
6m-(8(m-9))-42=0
We calculate terms in parentheses: -(8(m-9)), so:We get rid of parentheses
8(m-9)
We multiply parentheses
8m-72
Back to the equation:
-(8m-72)
6m-8m+72-42=0
We add all the numbers together, and all the variables
-2m+30=0
We move all terms containing m to the left, all other terms to the right
-2m=-30
m=-30/-2
m=+15
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