document.write( "Question 1066531: I have 45 coins all in nickles and dimes. They total $3.10. How many of each do I have (nickles and dimes). \n" ); document.write( "

Algebra.Com's Answer #681717 by ikleyn(52799) $\"\"$ $\"About$

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\n" ); document.write( "I have 45 coins all in nickles and dimes. They total $3.10. How many of each do I have (nickles and dimes).
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document.write( "Let N be the number of nickels.\r\n" );
document.write( "Then the number of dimes is (45-N).\r\n" );
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document.write( "Nickels contribute 5N cents to the total.\r\n" );
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document.write( "Dimes contribute 10*(45-N) cents to the total.\r\n" );
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document.write( "The \"value\" equation is\r\n" );
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document.write( "5N + 10*(45-N) = 310 cents.\r\n" );
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document.write( "5N + 450 - 10N = 310,\r\n" );
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document.write( "-5N = 310 - 450  --->  -5N = -140  --->  N=  = 28.\r\n" );
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document.write( "Answer. 28 Nickels and 45-28 = 17 dimes.\r\n" );
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\n" ); document.write( "\n" ); document.write( "There is entire bunch of lessons on coin problems\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( "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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