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Marrrta [24]
3 years ago
9

A person has 17 coins, all nickels and dimes, worth $1.25. How many nickels are there?

Mathematics
1 answer:
Leto [7]3 years ago
7 0
<span>9 Nickels, 8 Dimes...here is how i work it out!</span>

d + n = 17 
<span>0.1d + 0.05n = 1.25 </span>

<span>d = 17 - n </span>
<span>0.1 (17 - n) + 0.05n = 1.25 </span>
<span>1.7 - 0.1n + 0.05n = 1.25 </span>
<span>1.7 - 0.05n = 1.25 </span>
<span>-0.05n = -0.45 </span>
<span>n = 9 </span>

9 Nickels, 8 Dimes
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