3b+9(-7-b)=0

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Solution for 3b+9(-7-b)=0 equation: 



3b+9(-7-b)=0

We add all the numbers together, and all the variables

3b+9(-1b-7)=0

We multiply parentheses

3b-9b-63=0

We add all the numbers together, and all the variables

-6b-63=0

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

-6b=63

b=63/-6

b=-10+1/2

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