As a birthday gift, Zoey gave her niece an electronic piggy bank
that displays the total amount of money in the bank as well as the
total number of coins.
After depositing some number of pennies and dimes only, the
display read:
Money: $2.12
Number of coins: 41
Create a system of equations that represents this situation. Then
solve it using the substitution method to find out how many
pennies and dimes Zoey put in the bank.