4f-7f=-15

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Solution for 4f-7f=-15 equation: 



4f-7f=-15

We move all terms to the left:

4f-7f-(-15)=0

We add all the numbers together, and all the variables

-3f+15=0

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

-3f=-15

f=-15/-3

f=+5

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