7m+2m+m=20

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Solution for 7m+2m+m=20 equation: 



7m+2m+m=20

We move all terms to the left:

7m+2m+m-(20)=0

We add all the numbers together, and all the variables

10m-20=0

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

10m=20

m=20/10

m=2

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