-1=m-(-9)

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Solution for -1=m-(-9) equation: 



-1=m-(-9)

We move all terms to the left:

-1-(m-(-9))=0



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

m-(-9)

We add all the numbers together, and all the variables

m+9

Back to the equation:

-(m+9)



We get rid of parentheses

-m-9-1=0

We add all the numbers together, and all the variables

-1m-10=0

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

-m=10

m=10/-1

m=-10

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