20-7b=-16-9b

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Solution for 20-7b=-16-9b equation: 



20-7b=-16-9b

We move all terms to the left:

20-7b-(-16-9b)=0

We add all the numbers together, and all the variables

-7b-(-9b-16)+20=0

We get rid of parentheses

-7b+9b+16+20=0

We add all the numbers together, and all the variables

2b+36=0

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

2b=-36

b=-36/2

b=-18

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