First solve the price of each charm
$ 31.5 = 7x
X = 31.5 / 7
X = $ 4.5 / charm
So the maximum amount of charms megan can buy for $ 75 is
Y = $ 75 / $ 4.5 per charm
Y = 16.67 charm since there are no fraction of a charm
Then y < 16.67 charms
8.6m questions
11.3m answers