-20=-4b-6b

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Solution for -20=-4b-6b equation: 



-20=-4b-6b

We move all terms to the left:

-20-(-4b-6b)=0

We add all the numbers together, and all the variables

-(-10b)-20=0

We get rid of parentheses

10b-20=0

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

10b=20

b=20/10

b=2

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