20=2b+13

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Solution for 20=2b+13 equation: 



20=2b+13

We move all terms to the left:

20-(2b+13)=0

We get rid of parentheses

-2b-13+20=0

We add all the numbers together, and all the variables

-2b+7=0

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

-2b=-7

b=-7/-2

b=3+1/2

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