SOLUTION: Bill has 10 coins, all of which are dimes and quarters. If his dimes were quarters and his quarters were dimes, his coins would total 30 cents more. How many quarters does Bill ha
Algebra ->
Customizable Word Problem Solvers
-> Coins
-> SOLUTION: Bill has 10 coins, all of which are dimes and quarters. If his dimes were quarters and his quarters were dimes, his coins would total 30 cents more. How many quarters does Bill ha
Log On
Question 388122: Bill has 10 coins, all of which are dimes and quarters. If his dimes were quarters and his quarters were dimes, his coins would total 30 cents more. How many quarters does Bill have? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! Bill has 10 coins, all of which are dimes and quarters.
------------------------------------
If his dimes were quarters and his quarters were dimes, his coins would total 30 cents more.
------------------------------------
How many quarters does Bill have?
--------------------------
Equations:
Quantity: d + q = 10
10q+25d -(10d+25q) = 30
----------------------------
Modify:
d + q = 10
15d -15q = 30
---
Modify:
d + q = 10
d - q = 2
------
Subtract:
2q = 8
q = 4 (# of quarters)
========================
Cheers,
Stan H.
=======================
(