-5+7-20=20-2m

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Solution for -5+7-20=20-2m equation: 



-5+7-20=20-2m

We move all terms to the left:

-5+7-20-(20-2m)=0

We add all the numbers together, and all the variables

-(-2m+20)-5+7-20=0

We add all the numbers together, and all the variables

-(-2m+20)-18=0

We get rid of parentheses

2m-20-18=0

We add all the numbers together, and all the variables

2m-38=0

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

2m=38

m=38/2

m=19

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