7m+3m-4=15m+21

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Solution for 7m+3m-4=15m+21 equation: 



7m+3m-4=15m+21

We move all terms to the left:

7m+3m-4-(15m+21)=0

We add all the numbers together, and all the variables

10m-(15m+21)-4=0

We get rid of parentheses

10m-15m-21-4=0

We add all the numbers together, and all the variables

-5m-25=0

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

-5m=25

m=25/-5

m=-5

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