12f-5=139

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Solution for 12f-5=139 equation: 



12f-5=139

We move all terms to the left:

12f-5-(139)=0

We add all the numbers together, and all the variables

12f-144=0

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

12f=144

f=144/12

f=12

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