-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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