3f+1=4f-9

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Solution for 3f+1=4f-9 equation: 



3f+1=4f-9

We move all terms to the left:

3f+1-(4f-9)=0

We get rid of parentheses

3f-4f+9+1=0

We add all the numbers together, and all the variables

-1f+10=0

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

-f=-10

f=-10/-1

f=+10

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