document.write( "Question 802215: The ratio of boys and girls in a school is 3 : 2 . When 6 more girls join, this ratio becomes 6 : 5 . Then the number of boys in the school is \n" ); document.write( "
Algebra.Com's Answer #483811 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! The ratio of boys and girls in a school is 3 : 2 . \n" ); document.write( " When 6 more girls join, this ratio becomes 6 : 5 . \n" ); document.write( " Then the number of boys in the school is \n" ); document.write( ": \n" ); document.write( "Let x = the multiplier \n" ); document.write( "then \n" ); document.write( "3x = no. boys \n" ); document.write( "2x = no. of girls originally \n" ); document.write( ": \n" ); document.write( "When 6 girls added: \n" ); document.write( " \n" ); document.write( "Cross multiply \n" ); document.write( "5(3x) = 6(2x+6) \n" ); document.write( "15x = 12x + 36 \n" ); document.write( "15x - 12x = 36 \n" ); document.write( "3x = 36 \n" ); document.write( "x = 36/3 \n" ); document.write( "x = 12 is the multiplier \n" ); document.write( "therefore \n" ); document.write( "3(12) = 36 boys \n" ); document.write( ": \n" ); document.write( ": \n" ); document.write( "Check this \n" ); document.write( "2(12) = 24 girls originally \n" ); document.write( "then 30 girls when six added \n" ); document.write( " |