12=b-7

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Solution for 12=b-7 equation: 



12=b-7

We move all terms to the left:

12-(b-7)=0

We get rid of parentheses

-b+7+12=0

We add all the numbers together, and all the variables

-1b+19=0

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

-b=-19

b=-19/-1

b=+19

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