6=7m+21

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Solution for 6=7m+21 equation: 



6=7m+21

We move all terms to the left:

6-(7m+21)=0

We get rid of parentheses

-7m-21+6=0

We add all the numbers together, and all the variables

-7m-15=0

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

-7m=15

m=15/-7

m=-2+1/7

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