7=m+20

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Solution for 7=m+20 equation: 



7=m+20

We move all terms to the left:

7-(m+20)=0

We get rid of parentheses

-m-20+7=0

We add all the numbers together, and all the variables

-1m-13=0

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

-m=13

m=13/-1

m=-13

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