document.write( "Question 1205102: Eli Al’s has a collection of marbles. If he gives away 3/5 of his marbles to his friend and then buys 20 more marbles, he will have 100 marbles in total. How many marbles did Eli Al have originally? \n" ); document.write( "

Algebra.Com's Answer #841727 by ikleyn(52867) $\"\"$ $\"About$

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\n" ); document.write( "Eli Al’s has a collection of marbles. If he gives away 3/5 of his marbles to his friend
\n" ); document.write( "and then buys 20 more marbles, he will have 100 marbles in total.
\n" ); document.write( "How many marbles did Eli Al have originally?
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\n" ); document.write( "\n" ); document.write( " Good problem to solve it MENTALLY by a BACKWARD method.\r
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document.write( "     |   We start from the end and move backward to the beginning     |\r\n" );
document.write( "     |   step by step, using reasoning and making simple arithmetic.  |\r\n" );
document.write( "     |   No equations are needed, so this method is good even for     |\r\n" );
document.write( "     |         4-th grade young students of primary schools.          |\r\n" );
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document.write( "At the end, Eli Al has 100 marbles.\r\n" );
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document.write( "Hence, immediately before he bought 20 marbles, he had 100-20 = 80 marbles.\r\n" );
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document.write( "Hence, these 80 marbles were   =  of marbles he had initially.\r\n" );
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document.write( "Hence, initially he had   = 5*40 = 200 marbles.\r\n" );
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document.write( "ANSWER.  Initially, Eli Al had 200 marbles.\r\n" );
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\n" ); document.write( "\n" ); document.write( "Solved.\r
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\n" ); document.write( "\n" ); document.write( "To see many other similar and different solved problems, look into the lesson\r
\n" ); document.write( "\n" ); document.write( " Simple arithmetic word problems to solve by a backward method \r
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\n" ); document.write( "\n" ); document.write( "Learn the method from there.\r
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