20b+18-8b=-9(-3b+18)

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Solution for 20b+18-8b=-9(-3b+18) equation: 



20b+18-8b=-9(-3b+18)

We move all terms to the left:

20b+18-8b-(-9(-3b+18))=0

We add all the numbers together, and all the variables

12b-(-9(-3b+18))+18=0



We calculate terms in parentheses: -(-9(-3b+18)), so:

-9(-3b+18)

We multiply parentheses

27b-162

Back to the equation:

-(27b-162)



We get rid of parentheses

12b-27b+162+18=0

We add all the numbers together, and all the variables

-15b+180=0

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

-15b=-180

b=-180/-15

b=+12

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