20=-2(6b+8)

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Solution for 20=-2(6b+8) equation: 



20=-2(6b+8)

We move all terms to the left:

20-(-2(6b+8))=0



We calculate terms in parentheses: -(-2(6b+8)), so:

-2(6b+8)

We multiply parentheses

-12b-16

Back to the equation:

-(-12b-16)



We get rid of parentheses

12b+16+20=0

We add all the numbers together, and all the variables

12b+36=0

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

12b=-36

b=-36/12

b=-3

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