A computer store sold a total of 300 items in a month, and sold six times as many hard drives as they did CD-ROM drives, and half as many floppy drives as hard drives, how many of each item were sold?

Answer 1

Let H = number hard drives
C = number CD-Roms
F = number floppy drives.
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H = 6C
(1/2)H = F
F + H + C = 300
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Three equations.
Solve for H, C, F.
Post your work if you get stuck.