SOLUTION: Walter has $7.55 in quarters and dimes. If he has a total of 47 coins, how many are quarters?
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Question 1015071
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Walter has $7.55 in quarters and dimes. If he has a total of 47 coins, how many are quarters?
Answer by
crabbyoldgamer(13)
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q + d = 47
.25q + .1d = 7.55
q = 47-d
.25(47-d) + .1d = 7.55
11.75 - .25d + .1d = 7.55
4.2 = .15d
28=d
q = 47-d = 47-28 = 19
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