if a jar contains and nickels and dimes there are 20 coins in the jar and the total value of the coins is $1.20 how many nickels and how many times are in a jar

Answer 1

N+D =20

5N+10D = 120

5N + 5D =100 subtract to get

5D = 20

D=20/5 = 4 dimes

N=20-4 = 16 nickels

5(16) + 4(10) = 120