-12=2(4-b)

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Solution for -12=2(4-b) equation: 



-12=2(4-b)

We move all terms to the left:

-12-(2(4-b))=0

We add all the numbers together, and all the variables

-(2(-1b+4))-12=0



We calculate terms in parentheses: -(2(-1b+4)), so:

2(-1b+4)

We multiply parentheses

-2b+8

Back to the equation:

-(-2b+8)



We get rid of parentheses

2b-8-12=0

We add all the numbers together, and all the variables

2b-20=0

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

2b=20

b=20/2

b=10

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