-3=-(-2m-9)

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Solution for -3=-(-2m-9) equation: 



-3=-(-2m-9)

We move all terms to the left:

-3-(-(-2m-9))=0



We calculate terms in parentheses: -(-(-2m-9)), so:

-(-2m-9)

We get rid of parentheses

2m+9

Back to the equation:

-(2m+9)



We get rid of parentheses

-2m-9-3=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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