document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=821784>Question 821784</A>: <I><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "A zoo has no lions and ostriches. Pet Sitting guy spoke 15 heads and 50 legs. How many lions? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #494416 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=494416\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A zoo has lions and ostriches. Pet Sitting guy sees 15 heads and 50 legs. <BR>\n" );
document.write( "How many lions are there?<BR>\n" );
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document.write( "Head Equation: L + O = 15<BR>\n" );
document.write( "Legs Equation:4L +2O = 50<BR>\n" );
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document.write( "Modify for eliminatiion:<BR>\n" );
document.write( "4L + 4O = 4*15<BR>\n" );
document.write( "4L + 2O = 50<BR>\n" );
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document.write( "Subtract and solve for \"O\":<BR>\n" );
document.write( "2O = 10<BR>\n" );
document.write( "O = 5 (# of ostriches)<BR>\n" );
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document.write( "Solve for \"L\"<BR>\n" );
document.write( "L + O = 15<BR>\n" );
document.write( "L + 5 = 15<BR>\n" );
document.write( "L = 10 (# of lions)<BR>\n" );
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document.write( "cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "======================== </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );