8=m+20

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Solution for 8=m+20 equation: 



8=m+20

We move all terms to the left:

8-(m+20)=0

We get rid of parentheses

-m-20+8=0

We add all the numbers together, and all the variables

-1m-12=0

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

-m=12

m=12/-1

m=-12

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