-9=-8+b/20

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Solution for -9=-8+b/20 equation: 



-9=-8+b/20

We move all terms to the left:

-9-(-8+b/20)=0

We add all the numbers together, and all the variables

-(b/20-8)-9=0

We get rid of parentheses

-b/20+8-9=0

We multiply all the terms by the denominator


-b+8*20-9*20=0

We add all the numbers together, and all the variables

-1b-20=0

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

-b=20

b=20/-1

b=-20

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