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87=3(5+8m)
We move all terms to the left:
87-(3(5+8m))=0
We add all the numbers together, and all the variables
-(3(8m+5))+87=0
We calculate terms in parentheses: -(3(8m+5)), so:We get rid of parentheses
3(8m+5)
We multiply parentheses
24m+15
Back to the equation:
-(24m+15)
-24m-15+87=0
We add all the numbers together, and all the variables
-24m+72=0
We move all terms containing m to the left, all other terms to the right
-24m=-72
m=-72/-24
m=+3
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