87=7(3m+1)-4

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Solution for 87=7(3m+1)-4 equation: 



87=7(3m+1)-4

We move all terms to the left:

87-(7(3m+1)-4)=0



We calculate terms in parentheses: -(7(3m+1)-4), so:

7(3m+1)-4

We multiply parentheses

21m+7-4

We add all the numbers together, and all the variables

21m+3

Back to the equation:

-(21m+3)



We get rid of parentheses

-21m-3+87=0

We add all the numbers together, and all the variables

-21m+84=0

We move all terms containing m to the left, all other terms to the right

-21m=-84

m=-84/-21

m=+4

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