3b-69=7(-2b+6)+-9

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Solution for 3b-69=7(-2b+6)+-9 equation: 



3b-69=7(-2b+6)+-9

We move all terms to the left:

3b-69-(7(-2b+6)+-9)=0

We use the square of the difference formula

3b-(7(-2b+6)-9)-69=0



We calculate terms in parentheses: -(7(-2b+6)-9), so:

7(-2b+6)-9

We multiply parentheses

-14b+42-9

We add all the numbers together, and all the variables

-14b+33

Back to the equation:

-(-14b+33)



We get rid of parentheses

3b+14b-33-69=0

We add all the numbers together, and all the variables

17b-102=0

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

17b=102

b=102/17

b=6

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