3m+7m=90

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Solution for 3m+7m=90 equation: 



3m+7m=90

We move all terms to the left:

3m+7m-(90)=0

We add all the numbers together, and all the variables

10m-90=0

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

10m=90

m=90/10

m=9

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