Make F the sunject of the formula

[Gringo123]

This one is really hard. I have no idea even how to start. Can anyone explain how it's done?
I need to make F the subject of the formula.

1/F = 1/U + 1/V

Thanks

 

[Mentallic]

Do you know how to manipulate $$\frac{1}{U}+\frac{1}{V}$$ into a single fraction?

 

[Bohrok]

If making F the subject is all you have to do without any simplifying, the easy way would be to take the reciprocal of both sides. Or you can use some algebra and first multiply both sides by F so you don't have F in a denominator