document.write( "Question 1109157: There are quarters and dimes in the piggy bank. The coins are worth $8.50 and there are 15 more dimes than there are quarters. How many of each coins are in the piggy bank. \n" ); document.write( "

Algebra.Com's Answer #724164 by ikleyn(52802) $\"\"$ $\"About$

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document.write( "10d + 25q = 850   cents     (1)\r\n" );
document.write( "  d -    q = 15             (2)\r\n" );
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document.write( "Multiply eq(2) by 10 (bpth sides).  Keep eq(1) as is:\r\n" );
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document.write( "10d + 25q = 850   cents     (1')\r\n" );
document.write( "10d - 10q = 150             (2')\r\n" );
document.write( "-------------------------------------Now subtract eq(2') from eq(1'). You will get\r\n" );
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document.write( "    35q = 850-150 = 700  ====>  q =  = 20.\r\n" );
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document.write( "Answer.  2o quarters and 20+15 = 35 dimes.\r\n" );
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document.write( "Check.   Check it on your own.\r\n" );
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\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( "    - Three methods for solving standard (typical) coin word problems\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( "    - OVERVIEW of lessons on coin word problems\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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\n" ); document.write( "\n" ); document.write( "Save the link to this online textbook together with its description\r
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\n" ); document.write( "\n" ); document.write( "Free of charge online textbook in ALGEBRA-I
\n" ); document.write( "https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson\r
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\n" ); document.write( "\n" ); document.write( "to your archive and use it when it is needed.\r
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