7m-9+3m=129

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Solution for 7m-9+3m=129 equation: 



7m-9+3m=129

We move all terms to the left:

7m-9+3m-(129)=0

We add all the numbers together, and all the variables

10m-138=0

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

10m=138

m=138/10

m=13+4/5

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