45=8m+21

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Solution for 45=8m+21 equation: 



45=8m+21

We move all terms to the left:

45-(8m+21)=0

We get rid of parentheses

-8m-21+45=0

We add all the numbers together, and all the variables

-8m+24=0

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

-8m=-24

m=-24/-8

m=+3

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