m-(-12)=21

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Solution for m-(-12)=21 equation: 



m-(-12)=21

We move all terms to the left:

m-(-12)-(21)=0

determiningTheFunctionDomain
m-21-(-12)=0

We add all the numbers together, and all the variables

m-9=0

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

m=9

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