-7b-12b-(-7b)=12

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Solution for -7b-12b-(-7b)=12 equation: 



-7b-12b-(-7b)=12

We move all terms to the left:

-7b-12b-(-7b)-(12)=0

We add all the numbers together, and all the variables

-19b-(-7b)-12=0

We get rid of parentheses

-19b+7b-12=0

We add all the numbers together, and all the variables

-12b-12=0

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

-12b=12

b=12/-12

b=-1

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