21+21m=42m+20

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Solution for 21+21m=42m+20 equation: 



21+21m=42m+20

We move all terms to the left:

21+21m-(42m+20)=0

We get rid of parentheses

21m-42m-20+21=0

We add all the numbers together, and all the variables

-21m+1=0

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

-21m=-1

m=-1/-21

m=1/21

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