In Mindy's coin purse she has $2.18.

Question

In Mindy's coin purse she has $2.18. The her total coin purse change is comprised of twice as
many nickels as pennies and three less dimes than nickels. How many of each coin is in her
change purse?

Answer 1

10D + 5N + P = 218

 

N = 2P ---> P = N/2

 

N = D + 3 ---> D = N - 3

 

10(N-3) + 5N + N/2 = 218

 

10N - 30  + 5N + N/2 = 218

 

31/2N - 30 = 218

 

31/2 N = 248

 

N = 248*2/31

 

  = 16

 

16 nickles

8 pennies

13 dimes