7m+6-5m=-(3m-21)

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Solution for 7m+6-5m=-(3m-21) equation: 



7m+6-5m=-(3m-21)

We move all terms to the left:

7m+6-5m-(-(3m-21))=0

We add all the numbers together, and all the variables

2m-(-(3m-21))+6=0



We calculate terms in parentheses: -(-(3m-21)), so:

-(3m-21)

We get rid of parentheses

-3m+21

Back to the equation:

-(-3m+21)



We get rid of parentheses

2m+3m-21+6=0

We add all the numbers together, and all the variables

5m-15=0

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

5m=15

m=15/5

m=3

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