SOLUTION: Elaine has 50 coins,all nickels and dimes,that have a total value of $3.40. How many of her coins are nickels?

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Question 815394: Elaine has 50 coins,all nickels and dimes,that have a total value of $3.40. How many of her coins are nickels?
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
hint: solve the system

n+d = 50
0.05n+0.10d = 3.40

where

n = number of nickels
d = number of dimes