document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1083725>Question 1083725</A>: <I><SPAN STYLE=\"word-break: break-all;\"> There are 34 learners in a grade 9 class. The class register shows that there are 4 more girls than boys. How many boys are there in the class? </SPAN>\n" );
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document.write( "Answer: <font color=red>15 boys</font> in the class<BR>\n" );
document.write( "Extra info: there are 19 girls (four more than the boys). Note how 15+19 = 34<BR>\n" );
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document.write( "Explanation:\r<BR>\n" );
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document.write( "Let<BR>\n" );
document.write( "x = number of boys<BR>\n" );
document.write( "y = number of girls\r<BR>\n" );
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document.write( "There are 34 students meaning that<BR>\n" );
document.write( "x+y = 34\r<BR>\n" );
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document.write( "There are 4 more girls than boys, so<BR>\n" );
document.write( "y = x+4\r<BR>\n" );
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document.write( "Plug the second equation into the first and solve for x<BR>\n" );
document.write( "x+y = 34<BR>\n" );
document.write( "x+x+4 = 34<BR>\n" );
document.write( "2x+4 = 34<BR>\n" );
document.write( "2x+4-4 = 34-4<BR>\n" );
document.write( "2x = 30<BR>\n" );
document.write( "2x/2 = 30/2<BR>\n" );
document.write( "x = 15<BR>\n" );
document.write( "There are 15 boys.\r<BR>\n" );
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document.write( "We have the answer so we can stop here. As extra bit of info, you can plug x = 15 into the equation y = x+4 to find the number of girls<BR>\n" );
document.write( "y = x+4<BR>\n" );
document.write( "y = 15+4<BR>\n" );
document.write( "y = 19<BR>\n" );
document.write( "There are 19 girls.\r<BR>\n" );
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