1-b+8=12

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Solution for 1-b+8=12 equation: 



1-b+8=12

We move all terms to the left:

1-b+8-(12)=0

We add all the numbers together, and all the variables

-1b-3=0

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

-b=3

b=3/-1

b=-3

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