20b+18=-2(-10b-9)

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Solution for 20b+18=-2(-10b-9) equation: 



20b+18=-2(-10b-9)

We move all terms to the left:

20b+18-(-2(-10b-9))=0



We calculate terms in parentheses: -(-2(-10b-9)), so:

-2(-10b-9)

We multiply parentheses

20b+18

Back to the equation:

-(20b+18)



We get rid of parentheses

20b-20b-18+18=0

We add all the numbers together, and all the variables

=0

b=0/1

b=0

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