4m+21=m+3

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Solution for 4m+21=m+3 equation: 



4m+21=m+3

We move all terms to the left:

4m+21-(m+3)=0

We get rid of parentheses

4m-m-3+21=0

We add all the numbers together, and all the variables

3m+18=0

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

3m=-18

m=-18/3

m=-6

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