10m-21=(9+6m)

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Solution for 10m-21=(9+6m) equation: 



10m-21=(9+6m)

We move all terms to the left:

10m-21-((9+6m))=0

We add all the numbers together, and all the variables

10m-((6m+9))-21=0



We calculate terms in parentheses: -((6m+9)), so:

(6m+9)

We get rid of parentheses

6m+9

Back to the equation:

-(6m+9)



We get rid of parentheses

10m-6m-9-21=0

We add all the numbers together, and all the variables

4m-30=0

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

4m=30

m=30/4

m=7+1/2

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