7(3-m)=-21

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Solution for 7(3-m)=-21 equation: 



7(3-m)=-21

We move all terms to the left:

7(3-m)-(-21)=0

We add all the numbers together, and all the variables

7(-1m+3)-(-21)=0

We add all the numbers together, and all the variables

7(-1m+3)+21=0

We multiply parentheses

-7m+21+21=0

We add all the numbers together, and all the variables

-7m+42=0

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

-7m=-42

m=-42/-7

m=+6

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