7=b+12

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Solution for 7=b+12 equation: 



7=b+12

We move all terms to the left:

7-(b+12)=0

We get rid of parentheses

-b-12+7=0

We add all the numbers together, and all the variables

-1b-5=0

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

-b=5

b=5/-1

b=-5

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