document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1141747>Question 1141747</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In a dog park, there are 84 total legs. If there are 3 more dogs in the park than people, how many dogs are in the park? </SPAN>\n" );
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document.write( "(1) Formally, using algebra....<br><BR>\n" );
document.write( "The thing we are to find is the number of dogs, so let that be our variable:<br><BR>\n" );
document.write( "let x = # of dogs<BR>\n" );
document.write( "then x-3 = # of people<br><BR>\n" );
document.write( "The total number of legs -- 4 per dog and 2 per person -- is 84:<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4%28x%29%2B2%28x-3%29+=+84 ALIGN=MIDDLE  ALT=\"4%28x%29%2B2%28x-3%29+=+84\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4x%2B2x-6+=+84 ALIGN=MIDDLE  ALT=\"4x%2B2x-6+=+84\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=6x+=+90 ALIGN=MIDDLE  ALT=\"6x+=+90\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+15 ALIGN=MIDDLE  ALT=\"x+=+15\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "The number of dogs is 15.<br><BR>\n" );
document.write( "(2) Informally, using logical reasoning and mental arithmetic....<br><BR>\n" );
document.write( "(a) Add 3 more people, making the numbers of people and dogs the same.  That brings the total number of legs to 84+6 = 90.<BR>\n" );
document.write( "(b) Each dog-person pair has a total of 6 legs.<BR>\n" );
document.write( "(c) Therefore, the number of dogs in the park is 90/6 = 15. </SPAN>\n" );
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