20=4(7)+b

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Solution for 20=4(7)+b equation: 



20=4(7)+b

We move all terms to the left:

20-(4(7)+b)=0

We add all the numbers together, and all the variables

-(b+47)+20=0

We get rid of parentheses

-b-47+20=0

We add all the numbers together, and all the variables

-1b-27=0

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

-b=27

b=27/-1

b=-27

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