20=7+b+7

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Solution for 20=7+b+7 equation: 



20=7+b+7

We move all terms to the left:

20-(7+b+7)=0

We add all the numbers together, and all the variables

-(b+14)+20=0

We get rid of parentheses

-b-14+20=0

We add all the numbers together, and all the variables

-1b+6=0

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

-b=-6

b=-6/-1

b=+6

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