document.write( "Question 1140590: 80% of the people at a concert were adults. 75% of the children at a concert were boys. There were 36 more boys than girls.\r
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document.write( "a. How many boys were there at a concert?
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document.write( "b. Some boys left halfway through the concert after which 10% of the remaining people at the concert were boys. How many boys left the concert halfway? \n" );
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Algebra.Com's Answer #761170 by ikleyn(52798)![]() ![]() You can put this solution on YOUR website! .\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " I will answer question (a) only.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \r\n" ); document.write( "Let x be the number of girls.\r\n" ); document.write( "\r\n" ); document.write( "\r\n" ); document.write( "Then the number of boys is 3x, from the condition.\r\n" ); document.write( "\r\n" ); document.write( "\r\n" ); document.write( "You are given that 3x - x = 36, or 2x = 36; hence, x = 36/2 = 18 is the number of girls.\r\n" ); document.write( "\r\n" ); document.write( "\r\n" ); document.write( "Then the number of boys is 3x = 3*18 = 54. ANSWER\r\n" ); document.write( "\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |