-3(m+42)=6m

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Solution for -3(m+42)=6m equation: 



-3(m+42)=6m

We move all terms to the left:

-3(m+42)-(6m)=0

We add all the numbers together, and all the variables

-6m-3(m+42)=0

We multiply parentheses

-6m-3m-126=0

We add all the numbers together, and all the variables

-9m-126=0

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

-9m=126

m=126/-9

m=-14

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