7f-9=4f+9

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Solution for 7f-9=4f+9 equation: 



7f-9=4f+9

We move all terms to the left:

7f-9-(4f+9)=0

We get rid of parentheses

7f-4f-9-9=0

We add all the numbers together, and all the variables

3f-18=0

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

3f=18

f=18/3

f=6

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