document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=42102>Question 42102</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The ratio of robins to blackbirds that visit our feeder 4 to 7. If there are a total of 123 birds, how many robins visit the feeder? (show your work) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #27232 by </B><A HREF=/tutors/aboutme.mpl?userid=psbhowmick><B>psbhowmick(878)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=psbhowmick><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=psbhowmick><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=27232\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let there be 'x' robbins and 'y' blackbirds.<BR>\n" );
document.write( "As the ratio of robbins to blackbirds is 4:7, so<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2Fy=4%2F7 ALIGN=MIDDLE  ALT=\"x%2Fy=4%2F7\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=7x%2F4 ALIGN=MIDDLE  ALT=\"y=7x%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Also total no. of birds = no. of robbins + no. of blackbirds = x + y = 123 (given).\r<BR>\n" );
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document.write( "Thus we have two unknowns (x & y) and two equations to solve.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=7x%2F4 ALIGN=MIDDLE  ALT=\"y=7x%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" > ______(1)<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2By=123 ALIGN=MIDDLE  ALT=\"x%2By=123\"   DISABLED_style= \"max-width:90%; height:auto;\" >______(2)\r<BR>\n" );
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document.write( "Substituting the value of 'y' from (1) in (2),<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2B7x%2F4=123 ALIGN=MIDDLE  ALT=\"x%2B7x%2F4=123\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=11x%2F4+=+123 ALIGN=MIDDLE  ALT=\"11x%2F4+=+123\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=123%2A4%2F11 ALIGN=MIDDLE  ALT=\"x=123%2A4%2F11\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "or x = a fraction.\r<BR>\n" );
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document.write( "The number of birds cannot be fraction they have to be positive integers.<BR>\n" );
document.write( "So, your question has erroneous data.<BR>\n" );
document.write( "Before putting your question, be careful about typing mistakes in future. </SPAN>\n" );
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