-9b-7=b+123

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Solution for -9b-7=b+123 equation: 



-9b-7=b+123

We move all terms to the left:

-9b-7-(b+123)=0

We get rid of parentheses

-9b-b-123-7=0

We add all the numbers together, and all the variables

-10b-130=0

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

-10b=130

b=130/-10

b=-13

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