3f+9=5f-9-4f

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Solution for 3f+9=5f-9-4f equation: 



3f+9=5f-9-4f

We move all terms to the left:

3f+9-(5f-9-4f)=0

We add all the numbers together, and all the variables

3f-(f-9)+9=0

We get rid of parentheses

3f-f+9+9=0

We add all the numbers together, and all the variables

2f+18=0

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

2f=-18

f=-18/2

f=-9

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