-21(3m+6)=-3(4+2m)

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Solution for -21(3m+6)=-3(4+2m) equation: 



-21(3m+6)=-3(4+2m)

We move all terms to the left:

-21(3m+6)-(-3(4+2m))=0

We add all the numbers together, and all the variables

-21(3m+6)-(-3(2m+4))=0

We multiply parentheses

-63m-(-3(2m+4))-126=0



We calculate terms in parentheses: -(-3(2m+4)), so:

-3(2m+4)

We multiply parentheses

-6m-12

Back to the equation:

-(-6m-12)



We get rid of parentheses

-63m+6m+12-126=0

We add all the numbers together, and all the variables

-57m-114=0

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

-57m=114

m=114/-57

m=-2

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