document.write( "Question 1188238: Justin had some cards. He gave Alan 1/10 of the cards and bought another 45
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document.write( "new cards. Then he used 1/3 of the new total number of cards and bought 40 new
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document.write( "cards. He had 160 cards in the end. How many cards did he have at first? \n" );
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Algebra.Com's Answer #821446 by ikleyn(52832)![]() ![]() You can put this solution on YOUR website! .\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "The simplest way to solve such problems is a BACKWARD method,\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "when you MENTALLY start from the end and move to the beginning,\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "making inverse operations to the described, step by step.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Doing this way, the problem can be solved in your head mentally, with NO equations.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Pen or pencil together with piece of paper are good assistants.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Many problems of this kind are designed, created and intended SPECIALLY for you \r \n" ); document.write( "\n" ); document.write( "to learn and apply this method, and this given problem is ESPECIALLY GOOD for you to start with.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "See the lesson \r \n" ); document.write( "\n" ); document.write( " - Solving problems on the remaining amount \r \n" ); document.write( "\n" ); document.write( "in this site and find there several similar solved problems.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Start reading this lesson from the very beginning.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Happy learning ( ! )\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |