12.5-b=8

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Solution for 12.5-b=8 equation: 



12.5-b=8

We move all terms to the left:

12.5-b-(8)=0

We add all the numbers together, and all the variables

-1b+4.5=0

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

-b=-4.5

b=-4.5/-1

b=4+0.5/1

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