document.write( "Question 1103366: Hi
\n" );
document.write( "there were 121 pupils in a class. 8/9 of the boys and 4/5 of the girls were greek.the rest were english.if there were 104 greek pupils, how many greek boys were in the class.\r
\n" );
document.write( "\n" );
document.write( "thanks \n" );
document.write( "
Algebra.Com's Answer #718065 by ankor@dixie-net.com(22740) You can put this solution on YOUR website! There were 121 pupils in a class. 8/9 of the boys and 4/5 of the girls were Greek. \n" ); document.write( "The rest were English. \n" ); document.write( "If there were 104 Greek pupils, how many Greek boys were in the class. \n" ); document.write( ": \n" ); document.write( "Find the total no. of boys \n" ); document.write( ": \n" ); document.write( "let b = no. of boys \n" ); document.write( "let g = no. of girls \n" ); document.write( "then \n" ); document.write( "b + g = 121 \n" ); document.write( "g = 121 - b \n" ); document.write( "and \n" ); document.write( " \n" ); document.write( "get rid of those annoying fractions, multiply eq by 45, cancel and you have \n" ); document.write( "5(8b) + 9(4g) = 4680 \n" ); document.write( "40b + 36g = 4680 \n" ); document.write( "Replace g with (121-b) \n" ); document.write( "40b + 36(121-b) = 4680 \n" ); document.write( "40b + 4356 - 36b = 4680 \n" ); document.write( "40b - 36b = 4680 - 4356 \n" ); document.write( "4b = 324 \n" ); document.write( "b = 324/4 \n" ); document.write( "b = 81 boys \n" ); document.write( "Find the no. of Greek boys \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " \n" ); document.write( " |