Problema Solution
Your little brother saves all his coins. His piggy bank has a combination of 50 quarters and nickels. The quarters and nickels add to $8.50. How many quarters does he have in his piggy bank?
Answer provided by our tutors
Let
x = the number of quarters
y = the number of nickles
1 quarter = 25 cents
1 nickle = 5 cents
$1 = 100 cents
$8.50 = 850 cents
Using the given conditions we can write:
x + y = 50
25x + 5y = 850
........
click here to see the system of equations solved for x and y
........
x = 30 quarters
y = 20 nickles
He has 30 quarters and 20 nickles in the piggy bank.