20=8+3m

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Solution for 20=8+3m equation: 



20=8+3m

We move all terms to the left:

20-(8+3m)=0

We add all the numbers together, and all the variables

-(3m+8)+20=0

We get rid of parentheses

-3m-8+20=0

We add all the numbers together, and all the variables

-3m+12=0

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

-3m=-12

m=-12/-3

m=+4

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