20=2(1+b)

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Solution for 20=2(1+b) equation: 



20=2(1+b)

We move all terms to the left:

20-(2(1+b))=0

We add all the numbers together, and all the variables

-(2(b+1))+20=0



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

2(b+1)

We multiply parentheses

2b+2

Back to the equation:

-(2b+2)



We get rid of parentheses

-2b-2+20=0

We add all the numbers together, and all the variables

-2b+18=0

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

-2b=-18

b=-18/-2

b=+9

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