document.write( "Question 1080283: Ngo has a collection of dimes and quarters with a total value of $3.20. The number of dimes is 4 more than the number of quarters. How many of each coin does he have? \n" ); document.write( "

Algebra.Com's Answer #694489 by ikleyn(52813) $\"\"$ $\"About$

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document.write( "Let me tell you how to solve this problem MENTALLY.\r\n" );
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document.write( "Take off 4 dimes from the collection (mentally).\r\n" );
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document.write( "Then the new collection consists of equal number of dimes and quarters and is worth 280 cents.\r\n" );
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document.write( "Now you can group the coins in updated collection in sets/pairs consisting of 1 dime and 1 quarter.\r\n" );
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document.write( "Each pair is worth 10 cents + 25 cents = 35 cents.\r\n" );
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document.write( "How many pairs do you have ?  - But of course,  = 8.\r\n" );
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document.write( "    (I am sure you can calculate it mentally).\r\n" );
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document.write( "From here, there is only one step to get the \r\n" );
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document.write( "Answer: There are 8 quarters and 8+4 = 12 dimes in the original collection.\r\n" );
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\n" ); document.write( "\n" ); document.write( "Solved.\r
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\n" ); document.write( "\n" ); document.write( "On many other solved coin problems see the lessons \r
\n" ); document.write( "\n" ); document.write( "    - Coin problems\r
\n" ); document.write( "\n" ); document.write( "    - More Coin problems\r
\n" ); document.write( "\n" ); document.write( "    - Solving coin problems without using equations\r
\n" ); document.write( "\n" ); document.write( "    - Kevin and Randy Muise have a jar containing coins\r
\n" ); document.write( "\n" ); document.write( "    - Typical coin problems from the archive\r
\n" ); document.write( "\n" ); document.write( "    - More complicated coin problems\r
\n" ); document.write( "\n" ); document.write( "    - Solving coin problems mentally by grouping without using equations\r
\n" ); document.write( "\n" ); document.write( "    - Santa Claus helps solving coin problem\r
\n" ); document.write( "\n" ); document.write( "in this site.\r
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\n" ); document.write( "\n" ); document.write( "You will find there the lessons for all levels - from introductory to advanced,
\n" ); document.write( "and for all methods used - from one equation to two equations and even without equations. \r
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\n" ); document.write( "\n" ); document.write( "Read them and become an expert in solution of coin problems.\r
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\n" ); document.write( "\n" ); document.write( "Also, you have this free of charge online textbook in ALGEBRA-I in this site\r
\n" ); document.write( "\n" ); document.write( "    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.\r
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\n" ); document.write( "\n" ); document.write( "The referred lessons are the part of this online textbook under the topic \"Coin problems\".\r
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