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

Algebra ->  Finance -> SOLUTION: A person has 17 coins, all nickels and dimes, worth $1.25. How many nickels are there?       Log On


   

Question 306320: A person has 17 coins, all nickels and dimes, worth $1.25. How many nickels are there?

Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
n + d = 17 ___ d = 17 - n

10d + 5n = 125

substituting ___ 10(17 - n) + 5n = 125 ___ 170 - 10n + 5n = 125

45 = 5n ___ 9 = n