Gayle has 36 coins, all nickels and dimes, worth $2.40. How many dimes does she have?

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Gayle has 36 coins, all nickels and dimes, worth $2.40. How many dimes does she have?

Set up our given equations using n as the number of nickels and d as the number of dimes:

1. n + d = 36
2. 0.05n + 0.1d = 2.40

Use our simultaneous equations calculator to get:
n = 24
d = 12