-685+16=-9(-9b-6)+6

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Solution for -685+16=-9(-9b-6)+6 equation: 



-685+16=-9(-9b-6)+6

We move all terms to the left:

-685+16-(-9(-9b-6)+6)=0

We add all the numbers together, and all the variables

-(-9(-9b-6)+6)-669=0



We calculate terms in parentheses: -(-9(-9b-6)+6), so:

-9(-9b-6)+6

We multiply parentheses

81b+54+6

We add all the numbers together, and all the variables

81b+60

Back to the equation:

-(81b+60)



We get rid of parentheses

-81b-60-669=0

We add all the numbers together, and all the variables

-81b-729=0

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

-81b=729

b=729/-81

b=-9

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