2m-20=-2m

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Solution for 2m-20=-2m equation: 



2m-20=-2m

We move all terms to the left:

2m-20-(-2m)=0

We get rid of parentheses

2m+2m-20=0

We add all the numbers together, and all the variables

4m-20=0

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

4m=20

m=20/4

m=5

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