12f-18=42

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Solution for 12f-18=42 equation: 



12f-18=42

We move all terms to the left:

12f-18-(42)=0

We add all the numbers together, and all the variables

12f-60=0

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

12f=60

f=60/12

f=5

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