4=-2(b+3)

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Solution for 4=-2(b+3) equation: 



4=-2(b+3)

We move all terms to the left:

4-(-2(b+3))=0



We calculate terms in parentheses: -(-2(b+3)), so:

-2(b+3)

We multiply parentheses

-2b-6

Back to the equation:

-(-2b-6)



We get rid of parentheses

2b+6+4=0

We add all the numbers together, and all the variables

2b+10=0

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

2b=-10

b=-10/2

b=-5

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