3m+21=180

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Solution for 3m+21=180 equation: 



3m+21=180

We move all terms to the left:

3m+21-(180)=0

We add all the numbers together, and all the variables

3m-159=0

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

3m=159

m=159/3

m=53

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