-9=-3(-10+m)

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Solution for -9=-3(-10+m) equation: 



-9=-3(-10+m)

We move all terms to the left:

-9-(-3(-10+m))=0

We add all the numbers together, and all the variables

-(-3(m-10))-9=0



We calculate terms in parentheses: -(-3(m-10)), so:

-3(m-10)

We multiply parentheses

-3m+30

Back to the equation:

-(-3m+30)



We get rid of parentheses

3m-30-9=0

We add all the numbers together, and all the variables

3m-39=0

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

3m=39

m=39/3

m=13

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