21+7m=77

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Solution for 21+7m=77 equation: 



21+7m=77

We move all terms to the left:

21+7m-(77)=0

We add all the numbers together, and all the variables

7m-56=0

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

7m=56

m=56/7

m=8

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