558=m+(-21)

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Solution for 558=m+(-21) equation: 



558=m+(-21)

We move all terms to the left:

558-(m+(-21))=0



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

m+(-21)

We add all the numbers together, and all the variables

m-21

Back to the equation:

-(m-21)



We get rid of parentheses

-m+21+558=0

We add all the numbers together, and all the variables

-1m+579=0

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

-m=-579

m=-579/-1

m=+579

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