2f+5(f-4)=9f

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Solution for 2f+5(f-4)=9f equation: 



2f+5(f-4)=9f

We move all terms to the left:

2f+5(f-4)-(9f)=0

We add all the numbers together, and all the variables

-7f+5(f-4)=0

We multiply parentheses

-7f+5f-20=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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