4m+21=8m-3

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Solution for 4m+21=8m-3 equation: 



4m+21=8m-3

We move all terms to the left:

4m+21-(8m-3)=0

We get rid of parentheses

4m-8m+3+21=0

We add all the numbers together, and all the variables

-4m+24=0

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

-4m=-24

m=-24/-4

m=+6

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