SOLUTION: Good morning tutor! May I get a help for this problem? Alycia opens her piggy bank to find quarters and dimes inside. She counts the coins and finds that she has 56 coins total

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Question 1069785: Good morning tutor!
May I get a help for this problem?
Alycia opens her piggy bank to find quarters and dimes inside. She counts the coins and finds that she has 56 coins totaling $7.25. How many quarters were in the piggy bank, and how many dimes were in there?
Thank you so much!

Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
d dimes
q quarters

Setup equations for how many coins and how much money.
system%28d%2Bq=56%2C0.1d%2B0.25q=7.25%29

Simplify and solve the system.

Answer by ikleyn(52781) About Me  (Show Source):
You can put this solution on YOUR website!
.
Alycia opens her piggy bank to find quarters and dimes inside. She counts the coins and finds that she has 56 coins totaling $7.25.
How many quarters were in the piggy bank, and how many dimes were in there?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Let Q be the number of quarters.

Then the number of dimes is 56-Q.


Quarters contribute 25Q cents to the total.

Dimes contribute 10*(56-Q) cents to the total.

Your "value" equation is

25Q + 10*(56-Q) = 725 cents.

Simplify it and solve for Q:

25Q + 560 - 10Q = 725,

15Q = 725 - 560,

15Q = 165   --->  Q = 165%2F15 = 11.


Answer.  11 quarters and 56-11 = 45 dimes.

Check.  10*45 + 11*25 = 725 cents.  Correct !!

There is entire bunch of lessons on coin problems
    - Coin problems
    - More Coin problems
    - Solving coin problems without using equations
    - Kevin and Randy Muise have a jar containing coins
    - Typical coin problems from the archive
    - More complicated coin problems
    - Solving coin problems mentally by grouping without using equations
    - Santa Claus helps solving coin problem
in this site.

Read them and become an expert in solution of coin problems.

Also, you have this free of charge online textbook in ALGEBRA-I in this site
    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.

The referred lessons are the part of this online textbook under the topic "Coin problems".