document.write( "Question 1184048: Vincent had some peanuts. He ate 1/4 of it last week and 2/3 of the remaining peanuts
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document.write( "last night. His mother gave him another 4.14 kg of peanuts just now. Vincent then
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document.write( "found that he had as much peanuts as he had at first. How many kilograms of
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document.write( "peanuts did Vincent have at first? \n" );
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Algebra.Com's Answer #814586 by Theo(13342) You can put this solution on YOUR website! he started off with x kg of peanuts.\r \n" ); document.write( "\n" ); document.write( "he ate 1/4 of them last week.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "he was left with x = 1/4 * x = 3/4 * x.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "he ate 2/3 of the rest last night.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "he was left with 3/4 * x - 2/3 * 3/4 * x = 9/12 * x - 6/12 * x = 3/12 * x = 1/4 * x.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "his mother gave him another 4.14 kg of peanuts.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "he then had as many peanuts as he started with.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "1/4 * x + 4.14 kg = x is the equation that models this.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "subtract 1/4 * x from both sides of the equation to get:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "4.14 = x - 1/4 * x = 3/4 * x.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "4.14 = 3/4 * x is the equation after all the arithmetic is done.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "multiply both sides of the equation by 4/3 to get:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "4.14 * 4/3 = x\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "solve for x to get:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "x = 4/3 * 4.14 = 5.52 kg.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "that's your solution.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "to confirm, do the following.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "start with 5.52 kg. \n" ); document.write( "take out 1/4 * 5.52 kg to get 4.14 kg left. \n" ); document.write( "take out 2/3 * 4.14 kg to get 1.38 kg left. \n" ); document.write( "add 4.14 kg to that to get 5.52 kg.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "the solution is confirmed to be good. \n" ); document.write( "the original amount of peanuts was 5.52 kg.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |