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bonufazy [111]
4 years ago
12

Juan has 16 coins, all nickels and dimes. This collection of coins is worth $1. 15. How many nickels and dimes are there?

Mathematics
1 answer:
Elena L [17]4 years ago
5 0
You would have 7 dimes and 9 nickels, this is because 

5n +10d = 115           n + d = 16
n = 23 - 10d               n = 16 - d

23 - 10d = 16 -d 
7 = 9d
7/9 = d

Therefore there is 7 dimes and 9 nickels 
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