document.write( "Question 1171403: Whitney has 20 coins in her purse. Some are quarters and some are dimes. The total value of the coins is $3.35. How many quarters does Whitney have?\r
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Algebra.Com's Answer #796362 by ikleyn(52781) $\"\"$ $\"About$

You can put this solution on YOUR website!
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document.write( "x quarters\r\n" );
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document.write( "20-x dimes\r\n" );
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document.write( "Total money equation\r\n" );
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document.write( "    25x + 10*(20-x) = 335  cents.\r\n" );
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document.write( "It implies\r\n" );
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document.write( "    25x + 200 - 10x = 335\r\n" );
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document.write( "    25x - 10x       = 335 - 300\r\n" );
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document.write( "       15x          = 135\r\n" );
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document.write( "         x          = 135/15 = 9.\r\n" );
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document.write( "ANSWER.  9 quarters and 20-9 = 11 dimes.\r\n" );
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document.write( "CHECK.   9*25 + 11*10 = 335  cents, in total.   ! Correct !\r\n" );
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