document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=102460>Question 102460</A>: <I><SPAN STYLE=\"word-break: break-all;\"> (y+10)*X=1800<BR>\n" );
document.write( "(x+10)*Y = 2000 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #74482 by </B><A HREF=/tutors/aboutme.mpl?userid=Fombitz><B>Fombitz(32388)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Fombitz><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=Fombitz><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=74482\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 1.(Y+10)*X=1800<BR>\n" );
document.write( "2.(X+10)*Y = 2000\r<BR>\n" );
document.write( "\n" );
document.write( "Use one equation to solve for one variable in terms of another and then solve using the second equation. Let's use equation 2 and solve for Y. <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28X%2B10%29%2AY+=+2000 ALIGN=MIDDLE  ALT=\"%28X%2B10%29%2AY+=+2000\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cross%28X%2B10%29%2AY%2Fcross%28X%2B10%29=2000%2F%28X%2B10%29 ALIGN=MIDDLE  ALT=\"cross%28X%2B10%29%2AY%2Fcross%28X%2B10%29=2000%2F%28X%2B10%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Y=2000%2F%28X%2B10%29 ALIGN=MIDDLE  ALT=\"Y=2000%2F%28X%2B10%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Now use equation (1) and substitute for Y\r<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28Y%2B10%29%2AX+=+1800 ALIGN=MIDDLE  ALT=\"%28Y%2B10%29%2AX+=+1800\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%282000%2F%28X%2B10%29%2B10%29%2AX+=+1800 ALIGN=MIDDLE  ALT=\"%282000%2F%28X%2B10%29%2B10%29%2AX+=+1800\"   DISABLED_style= \"max-width:90%; height:auto;\" > Substitute<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2000%2AX%2F%28X%2B10%29%2B10%2AX+=+1800 ALIGN=MIDDLE  ALT=\"2000%2AX%2F%28X%2B10%29%2B10%2AX+=+1800\"   DISABLED_style= \"max-width:90%; height:auto;\" >Distributive property<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%282000%2B10%2A%28X%2B10%29%29%2AX+=+1800%2A%28X%2B10%29 ALIGN=MIDDLE  ALT=\"%282000%2B10%2A%28X%2B10%29%29%2AX+=+1800%2A%28X%2B10%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > Multiply both sides by (X+10)<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2000%2AX%2B10%2A%28X%5E2%29%2B100%2AX+=+1800%2AX%2B18000 ALIGN=MIDDLE  ALT=\"2000%2AX%2B10%2A%28X%5E2%29%2B100%2AX+=+1800%2AX%2B18000\"   DISABLED_style= \"max-width:90%; height:auto;\" >Distribute and simplify.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10%2A%28X%5E2%29%2B300%2AX-18000+=+0 ALIGN=MIDDLE  ALT=\"10%2A%28X%5E2%29%2B300%2AX-18000+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" >Additive inverse of 1800x and 20000.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=X%5E2%2B30%2AX+-1800+=+0 ALIGN=MIDDLE  ALT=\"X%5E2%2B30%2AX+-1800+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" >Divide by 10.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28X%2B60%29%2A%28X-30%29+=+0 ALIGN=MIDDLE  ALT=\"%28X%2B60%29%2A%28X-30%29+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" >Factor the equation. <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=X=-60 ALIGN=MIDDLE  ALT=\"X=-60\"   DISABLED_style= \"max-width:90%; height:auto;\" > and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=X=30 ALIGN=MIDDLE  ALT=\"X=30\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "From equation (2),<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2.%28X%2B10%29%2AY+=+2000 ALIGN=MIDDLE  ALT=\"2.%28X%2B10%29%2AY+=+2000\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "For X=-60,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28-60%2B10%29%2AY+=+2000 ALIGN=MIDDLE  ALT=\"%28-60%2B10%29%2AY+=+2000\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28-50%29%2AY+=+2000 ALIGN=MIDDLE  ALT=\"%28-50%29%2AY+=+2000\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Y=-40 ALIGN=MIDDLE  ALT=\"Y=-40\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "For X=30,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28Y%2B10%29%2AY+=+2000 ALIGN=MIDDLE  ALT=\"%28Y%2B10%29%2AY+=+2000\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%2830%2B10%29%2AY+=+2000 ALIGN=MIDDLE  ALT=\"%2830%2B10%29%2AY+=+2000\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%2840%29%2AY+=+2000 ALIGN=MIDDLE  ALT=\"%2840%29%2AY+=+2000\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Y=50 ALIGN=MIDDLE  ALT=\"Y=50\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Two solution pairs:<BR>\n" );
document.write( "X=-60 and Y=-40<BR>\n" );
document.write( "and<BR>\n" );
document.write( "X=30 and Y=50 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );