-3m-7(1-m)=13

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Solution for -3m-7(1-m)=13 equation: 



-3m-7(1-m)=13

We move all terms to the left:

-3m-7(1-m)-(13)=0

We add all the numbers together, and all the variables

-3m-7(-1m+1)-13=0

We multiply parentheses

-3m+7m-7-13=0

We add all the numbers together, and all the variables

4m-20=0

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

4m=20

m=20/4

m=5

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