document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1065331>Question 1065331</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If the average monthly salary of two builders is £2210 and three times their difference is 540 find their salaries. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #680481 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=680481\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> let x = the salary of the first builder.<BR>\n" );
document.write( "let y = the salary of the second builder.\r<BR>\n" );
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document.write( "their average monthly salary is 2210.<BR>\n" );
document.write( "this means that (x + y) /2 = 2210<BR>\n" );
document.write( "multiply both sides of this equation by 2 and you get x + y = 4420\r<BR>\n" );
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document.write( "3 times their difference is 540.<BR>\n" );
document.write( "this means that 3 * (x - y) = 540<BR>\n" );
document.write( "divide both sides of this equation by 3 and you get x - y = 180\r<BR>\n" );
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document.write( "you have 2 equations that need to be solved simultaneously.\r<BR>\n" );
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document.write( "they are:\r<BR>\n" );
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document.write( "x + y = 4420<BR>\n" );
document.write( "x - y = 180\r<BR>\n" );
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document.write( "add both sides of each equation together and you get:\r<BR>\n" );
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document.write( "2x = 4600\r<BR>\n" );
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document.write( "divide both sides of the equation by 2 and you get x = 2300\r<BR>\n" );
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document.write( "since x + y = 4420, this means that y must be equal to 4420 - 2300 = 2120\r<BR>\n" );
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document.write( "you have x = 2300 and y = 2120.\r<BR>\n" );
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document.write( "their average is (2300 + 2120) / 2 = 2210\r<BR>\n" );
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document.write( "3 times their difference is 3 * (2300 - 2120) = 3 * 180 = 540\r<BR>\n" );
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document.write( "that's your solution.\r<BR>\n" );
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document.write( "the salary of one of the builders is 2300 and the salary of the other builder is 2120.\r<BR>\n" );
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document.write( " </SPAN>\n" );
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