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Jacy has a collection of 140 coins worth $19.00. She has only nickels, dimes, and quarters. The difference in thenumber of dimes and the number of quarters is 10. How many nickels are in Jacy's collection?

 Sep 15, 2020
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N + D + Q = 140................................(1)
0.05N + 0.10D + 0.25Q =19..............(2)
Q - D = 10..........................................(3)
Solve for N, D, Q by using substitutions:

 

N = 50 Nickels
D = 40 Dimes
Q = 50 Quarters.

 Sep 15, 2020

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