Length of movie projected at 24 frames per second: l=24f. Solve for f

Question

I just can't seem to figure this problem out because I have trouble with algebra. I'm desperate for help on this word problem as it is in my homework. It confuses me on what to do first. I just can't solve it no matter what.

Answer 1

L = 24*f

 

Where L = the length of a movie in time and f = the number of frames (still images) in the video.  The frames are played at a a rate of 24 frames per second to simulate motion.  To solve for f, simply divide both sides of the equation by 24:

 

L/24 = 24f/24

 

The 24's on the right hand side cancel, leaving:

 

L/24 = f