33=m+21

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Solution for 33=m+21 equation: 



33=m+21

We move all terms to the left:

33-(m+21)=0

We get rid of parentheses

-m-21+33=0

We add all the numbers together, and all the variables

-1m+12=0

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

-m=-12

m=-12/-1

m=+12

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