12=-2(2+2b)

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



12=-2(2+2b)

We move all terms to the left:

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

We add all the numbers together, and all the variables

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



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

-2(2b+2)

We multiply parentheses

-4b-4

Back to the equation:

-(-4b-4)



We get rid of parentheses

4b+4+12=0

We add all the numbers together, and all the variables

4b+16=0

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

4b=-16

b=-16/4

b=-4

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