3m-21+3m=12

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Solution for 3m-21+3m=12 equation: 



3m-21+3m=12

We move all terms to the left:

3m-21+3m-(12)=0

We add all the numbers together, and all the variables

6m-33=0

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

6m=33

m=33/6

m=5+1/2

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