7(-2m+9)=21

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Solution for 7(-2m+9)=21 equation: 



7(-2m+9)=21

We move all terms to the left:

7(-2m+9)-(21)=0

We multiply parentheses

-14m+63-21=0

We add all the numbers together, and all the variables

-14m+42=0

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

-14m=-42

m=-42/-14

m=+3

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