13=m+(-13)

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Solution for 13=m+(-13) equation: 



13=m+(-13)

We move all terms to the left:

13-(m+(-13))=0



We calculate terms in parentheses: -(m+(-13)), so:

m+(-13)

We add all the numbers together, and all the variables

m-13

Back to the equation:

-(m-13)



We get rid of parentheses

-m+13+13=0

We add all the numbers together, and all the variables

-1m+26=0

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

-m=-26

m=-26/-1

m=+26

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