7(1+3m)-4=87

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



7(1+3m)-4=87

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We add all the numbers together, and all the variables

7(3m+1)-91=0

We multiply parentheses

21m+7-91=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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