5m+15+7m-21=180

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Solution for 5m+15+7m-21=180 equation: 



5m+15+7m-21=180

We move all terms to the left:

5m+15+7m-21-(180)=0

We add all the numbers together, and all the variables

12m-186=0

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

12m=186

m=186/12

m=15+1/2

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