Madison H.
asked 02/19/19
a collection of dimes and nickels is worth $3.30. if there are 42 coins in all how many of each kind of coin are there?
d + n = 42
10d + 5n = 330
-10d - 10n = - 420
10d + 5n = 330
-5n = -90
n = 18
d + 18 = 42
d = 24
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