document.write( "Question 969372: Ron has 11 coins with a total value of $1.35. The coins are nickels and quarters. How many of each coin does he have?
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Algebra.Com's Answer #592273 by Edwin McCravy(20056) $\"\"$ $\"About$

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document.write( "Let the number of nickels be x\r\n" );
document.write( "Then the number of quarters, using\r\n" );
document.write( "ONE PART = TOTAL MINUS OTHER PART,\r\n" );
document.write( "is 11-x.\r\n" );
document.write( "                      Value      Value\r\n" );
document.write( "Type       Number       of         of\r\n" );
document.write( " of          of        EACH       ALL\r\n" );
document.write( "coin        coins      coin      coins\r\n" );
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document.write( "nickels      x        $0.05      $0.05x\r\n" );
document.write( "quarters   11-x       $0.25      $0.25(11-x)\r\n" );
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document.write( "TOTALS      11        -----      $1.35\r\n" );
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document.write( " The equation comes from the column on the right\r\n" );
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document.write( "    0.05x + 0.25(11-x) = 1.35\r\n" );
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document.write( "Get rid of decimals by multiplying every term by 100:\r\n" );
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document.write( "         5x + 25(11-x) = 135\r\n" );
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document.write( "        5x + 275 - 25x = 135\r\n" );
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document.write( "            -20x + 275 = 135\r\n" );
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document.write( "                  -20x = -140\r\n" );
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document.write( "                     x = 7 = the number of nickels.\r\n" );
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document.write( "The number of quarters is 11-x or 11-7 or 4 quarters.\r\n" );
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document.write( "Checking:  7 nickels is $0.35 and 4 quarters is $1.00\r\n" );
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document.write( "            And indeed $0.35 + $1.00 = $1.35\r\n" );
document.write( "Edwin

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