document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1201373>Question 1201373</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hi. How can I solve this? Thanks.<BR>\n" );
document.write( "Both Mr Gan and Mr Koon received a salary every month. Last month, Mr Gan's salary was 9/10 of Mr Koon's salary. This month, Mr Gan's salary decreased by $220 while Mr Koon's salary increased by $200. In the end, Mr Gan's salary was 7/10 of Mr Koon's salary. What was Mr Gan's salary last month? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #835889 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13200)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=835889\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "You CAN solve the problem using fractions or decimals, as shown in responses from other tutors.  But the actual work to solve the problem is usually easier if we can set the problem up using whole numbers.<br><BR>\n" );
document.write( "Since last month Mr Gan's salary was 9/10 of Mr Koon's salary...<br><BR>\n" );
document.write( "let 9x = Mr. Gan's salary last month<BR>\n" );
document.write( "let 10x = Mr. Koon's salary last month<br><BR>\n" );
document.write( "When Mr. Gan's salary decreased by $220 and Mr. Koon's salary increased by $200, Mr. Gan's new salary was 7/10 of Mr Koon's new salary:<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%289x-220%29%2F%2810x%2B200%29=7%2F10 ALIGN=MIDDLE  ALT=\"%289x-220%29%2F%2810x%2B200%29=7%2F10\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=7%2810x%2B200%29=10%289x-220%29 ALIGN=MIDDLE  ALT=\"7%2810x%2B200%29=10%289x-220%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=70x%2B1400=90x-2200 ALIGN=MIDDLE  ALT=\"70x%2B1400=90x-2200\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3600=20x ALIGN=MIDDLE  ALT=\"3600=20x\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=180 ALIGN=MIDDLE  ALT=\"x=180\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "ANSWER: Mr. Gan's salary last month was 9x = 9($180) = $1620<br><BR>\n" );
document.write( " </SPAN>\n" );
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