document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=762862>Question 762862</A>: <I><SPAN STYLE=\"word-break: break-all;\"> how can i solve the equations 72x+50y=9xy & 90x+70y=12xy\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #464266 by </B><A HREF=/tutors/aboutme.mpl?userid=sachi><B>sachi(548)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=sachi><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=sachi><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=464266\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 72x+50y=9xy ..............1<BR>\n" );
document.write( "90x+70y=12xy..............2<BR>\n" );
document.write( "now dividing both eqns by xy on both sides we will get<BR>\n" );
document.write( "72/y+50/x=9..........3<BR>\n" );
document.write( "90/y+70/x=12.........4<BR>\n" );
document.write( "multiplying eqn 3 by 10 & eqn 4 by 8 we get<BR>\n" );
document.write( "720/y+500/x=90.......5 <BR>\n" );
document.write( "720/y+560/x=96<BR>\n" );
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document.write( "-60/x=-6<BR>\n" );
document.write( "or x=10<BR>\n" );
document.write( "putting this value in eqn 3<BR>\n" );
document.write( "72/y+50/10=9<BR>\n" );
document.write( "or 72/y=9-5=4<BR>\n" );
document.write( "or y=72/4=18<BR>\n" );
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