21f+2=9f+8

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Solution for 21f+2=9f+8 equation: 



21f+2=9f+8

We move all terms to the left:

21f+2-(9f+8)=0

We get rid of parentheses

21f-9f-8+2=0

We add all the numbers together, and all the variables

12f-6=0

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

12f=6

f=6/12

f=1/2

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