-20=-8(b-2)-4

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Solution for -20=-8(b-2)-4 equation: 



-20=-8(b-2)-4

We move all terms to the left:

-20-(-8(b-2)-4)=0



We calculate terms in parentheses: -(-8(b-2)-4), so:

-8(b-2)-4

We multiply parentheses

-8b+16-4

We add all the numbers together, and all the variables

-8b+12

Back to the equation:

-(-8b+12)



We get rid of parentheses

8b-12-20=0

We add all the numbers together, and all the variables

8b-32=0

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

8b=32

b=32/8

b=4

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