4f+9=2f-11

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Solution for 4f+9=2f-11 equation: 



4f+9=2f-11

We move all terms to the left:

4f+9-(2f-11)=0

We get rid of parentheses

4f-2f+11+9=0

We add all the numbers together, and all the variables

2f+20=0

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

2f=-20

f=-20/2

f=-10

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