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
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Algebra.Com's Answer #718065 by ankor@dixie-net.com(22740)\"\" \"About 
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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.
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\n" ); document.write( "Find the total no. of boys
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\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( "\"8%2F9\"b + \"4%2F5\"g = 104
\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( "\"8%2F9\"*81 = 72 Greek boys\r
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