20+4b=-3(4-4b)

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Solution for 20+4b=-3(4-4b) equation: 



20+4b=-3(4-4b)

We move all terms to the left:

20+4b-(-3(4-4b))=0

We add all the numbers together, and all the variables

4b-(-3(-4b+4))+20=0



We calculate terms in parentheses: -(-3(-4b+4)), so:

-3(-4b+4)

We multiply parentheses

12b-12

Back to the equation:

-(12b-12)



We get rid of parentheses

4b-12b+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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