Krishaun has $5, $10, and $20 coins worth a total of $560. She has the same number of $5 coins as $10 coins, and the same number
of $10 coins as $20 coins. How many $20 coins does Krishaun have?
a.16
b.15
c.20
d.28
e.17
1 answer:
f = t = n five ten and twenty
5n + 10n + 20n = 560
35n = 560
n = twenty dollar coins = 16
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