21=4m+6

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Solution for 21=4m+6 equation: 



21=4m+6

We move all terms to the left:

21-(4m+6)=0

We get rid of parentheses

-4m-6+21=0

We add all the numbers together, and all the variables

-4m+15=0

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

-4m=-15

m=-15/-4

m=3+3/4

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