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8m-40=-4(m+4)
We move all terms to the left:
8m-40-(-4(m+4))=0
We calculate terms in parentheses: -(-4(m+4)), so:We get rid of parentheses
-4(m+4)
We multiply parentheses
-4m-16
Back to the equation:
-(-4m-16)
8m+4m+16-40=0
We add all the numbers together, and all the variables
12m-24=0
We move all terms containing m to the left, all other terms to the right
12m=24
m=24/12
m=2
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