9m+20=-20-7m+20m

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Solution for 9m+20=-20-7m+20m equation: 



9m+20=-20-7m+20m

We move all terms to the left:

9m+20-(-20-7m+20m)=0

We add all the numbers together, and all the variables

9m-(13m-20)+20=0

We get rid of parentheses

9m-13m+20+20=0

We add all the numbers together, and all the variables

-4m+40=0

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

-4m=-40

m=-40/-4

m=+10

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