4-b=12.

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Solution for 4-b=12. equation: 



4-b=12.

We move all terms to the left:

4-b-(12.)=0

We add all the numbers together, and all the variables

-b+4-12=0

We add all the numbers together, and all the variables

-1b-8=0

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

-b=8

b=8/-1

b=-8

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