12=-4(b-2)

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



12=-4(b-2)

We move all terms to the left:

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



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

-4(b-2)

We multiply parentheses

-4b+8

Back to the equation:

-(-4b+8)



We get rid of parentheses

4b-8+12=0

We add all the numbers together, and all the variables

4b+4=0

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

4b=-4

b=-4/4

b=-1

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