3=2(m+7)-(-1)

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Solution for 3=2(m+7)-(-1) equation: 



3=2(m+7)-(-1)

We move all terms to the left:

3-(2(m+7)-(-1))=0



We calculate terms in parentheses: -(2(m+7)-(-1)), so:

2(m+7)-(-1)

We add all the numbers together, and all the variables

2(m+7)+1

We multiply parentheses

2m+14+1

We add all the numbers together, and all the variables

2m+15

Back to the equation:

-(2m+15)



We get rid of parentheses

-2m-15+3=0

We add all the numbers together, and all the variables

-2m-12=0

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

-2m=12

m=12/-2

m=-6

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