8m+21=77

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Solution for 8m+21=77 equation: 



8m+21=77

We move all terms to the left:

8m+21-(77)=0

We add all the numbers together, and all the variables

8m-56=0

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

8m=56

m=56/8

m=7

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