4m=2(5m+21)

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Solution for 4m=2(5m+21) equation: 



4m=2(5m+21)

We move all terms to the left:

4m-(2(5m+21))=0



We calculate terms in parentheses: -(2(5m+21)), so:

2(5m+21)

We multiply parentheses

10m+42

Back to the equation:

-(10m+42)



We get rid of parentheses

4m-10m-42=0

We add all the numbers together, and all the variables

-6m-42=0

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

-6m=42

m=42/-6

m=-7

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