document.write( "Question 1203368: Hi
\n" ); document.write( "Irene bought 10 pens with 2/5 of her money. If she bought another 24 pens then she would need $18 more. What is the amount of money she had left after buying the 10 pens.
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Algebra.Com's Answer #838866 by ikleyn(52847) $\"\"$ $\"About$

You can put this solution on YOUR website!
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\n" ); document.write( "Irene bought 10 pens with 2/5 of her money. If she bought another 24 pens then she would need $18 more.
\n" ); document.write( "What is the amount of money she had left after buying the 10 pens.
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\n" ); document.write( "\n" ); document.write( "        Such problems on \"shortage the money\" are traditionally considered
\n" ); document.write( "        as entertainment Math problems.\r
\n" ); document.write( "\n" ); document.write( "        Therefore, I will give you MENTAL solution below.\r
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document.write( "Since Irene bought 10 pens with 2/5 of her money, it means that\r\n" );
document.write( "she could buy 15 more pens for her remaining 3/5 of money.\r\n" );
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document.write( "But the problem said that if she bought additional 24 pens (additional to that 10 pens), \r\n" );
document.write( "she would be $18 short.\r\n" );
document.write( "It means that 24-15 = 9 extra pens cost $18. Hence, each pen costs 18/9 = 2 dollars.\r\n" );
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document.write( "Great (!) Half of the problem is solved. The rest is just easy.\r\n" );
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document.write( "One pen costs 2 dollars; hence, 15 pens cost 30 dollars, \r\n" );
document.write( "and it is the amount of money she had left after buying the 10 pens.\r\n" );
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document.write( "ANSWER.  After buying 10 pens, Irene had left 30 dollars.\r\n" );
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\n" ); document.write( "\n" ); document.write( "Solved.\r
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\n" ); document.write( "\n" ); document.write( "The solution by @josgarithmetic is incorrect, as usual.\r
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\n" ); document.write( "\n" ); document.write( "Therefore, for the peace in your mind and for safety of your mind, ignore his post.\r
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