SOLUTION: Your piggy bank has a total of 20 coins in it; some are dimes and some are nickels. If you have a total of $1.25, how many nickels do you have?
Algebra ->
Customizable Word Problem Solvers
-> Coins
-> SOLUTION: Your piggy bank has a total of 20 coins in it; some are dimes and some are nickels. If you have a total of $1.25, how many nickels do you have?
Log On
Question 536971: Your piggy bank has a total of 20 coins in it; some are dimes and some are nickels. If you have a total of $1.25, how many nickels do you have? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! Your piggy bank has a total of 20 coins in it; some are dimes and some are nickels. If you have a total of $1.25, how many nickels do you have?
----
Equation:
Quantity: n + d = 20
Value::: 5n+10d = 125 cents
-------------------------------
Multiply thru Quantity by 5:
5n + 5d = 5*20
5n +10d = 125
----
Subtract and solve for "d":
5d = 25
d = 5 (# of dimes)
-----------------------
Solve for "n":
n + d = 20
n + 5 = 20
n = 15 (# of nickels)
===========================
Cheers,
Stan H.
(