7m-m-m=15

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Solution for 7m-m-m=15 equation: 



7m-m-m=15

We move all terms to the left:

7m-m-m-(15)=0

We add all the numbers together, and all the variables

5m-15=0

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

5m=15

m=15/5

m=3

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