20b-9=-9+20b

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



20b-9=-9+20b

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

20b-20b+9-9=0

We add all the numbers together, and all the variables

=0

b=0/1

b=0

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