document.write( "Question 1150617: In Tae Kwon Do class, 40% of the students are boys. There are 18 fewer boys than girls. How many students are in the Tae Kwon Do class altogether? \n" ); document.write( "

Algebra.Com's Answer #772029 by ikleyn(52781) $\"\"$ $\"About$

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document.write( "Let x be the number of students in the class.\r\n" );
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document.write( "Then the number of girls is 0.6x, while the number of boys is 0.4x.\r\n" );
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document.write( "The difference is\r\n" );
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document.write( "    0.6x - 0.4x = 18, \r\n" );
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document.write( "i.e.\r\n" );
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document.write( "    0.2x        = 18\r\n" );
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document.write( "       x        = 18/0.2 = 180/2 = 90.    ANSWER\r\n" );
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