2m+m+9=180

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Solution for 2m+m+9=180 equation: 



2m+m+9=180

We move all terms to the left:

2m+m+9-(180)=0

We add all the numbers together, and all the variables

3m-171=0

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

3m=171

m=171/3

m=57

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