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-25+7m=-5(-4m-8)
We move all terms to the left:
-25+7m-(-5(-4m-8))=0
We calculate terms in parentheses: -(-5(-4m-8)), so:We get rid of parentheses
-5(-4m-8)
We multiply parentheses
20m+40
Back to the equation:
-(20m+40)
7m-20m-40-25=0
We add all the numbers together, and all the variables
-13m-65=0
We move all terms containing m to the left, all other terms to the right
-13m=65
m=65/-13
m=-5
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