-20-2b=20-4b

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Solution for -20-2b=20-4b equation: 



-20-2b=20-4b

We move all terms to the left:

-20-2b-(20-4b)=0

We add all the numbers together, and all the variables

-2b-(-4b+20)-20=0

We get rid of parentheses

-2b+4b-20-20=0

We add all the numbers together, and all the variables

2b-40=0

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

2b=40

b=40/2

b=20

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