document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1193381>Question 1193381</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The Jurassic Zoo charges ​$12 for each adult admission and ​$7 for each child. The total bill for the 131  people from a school trip was ​$1062. How many adults and how many children went to the​ zoo?  \r<BR>\n" );
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document.write( "there were _adults and _children on the trip </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #825395 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13200)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=825395\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "First we will solve the problem using logical reasoning and simple mental arithmetic, since that gives us good mental exercise.<br><BR>\n" );
document.write( "If all 131 people were children, the total cost of admission would have been 131($7)=$917.<BR>\n" );
document.write( "The actual cost, $1062, was $1062-$917 = $145 more.<BR>\n" );
document.write( "The cost of each  adult admission is $5 more than the cost of each child admission.<BR>\n" );
document.write( "The number of adult tickets, to make the additional $145, was $145/$5=29.<br><BR>\n" );
document.write( "ANSWER: there were 29 adults and 131-29=102 children<br><BR>\n" );
document.write( "CHECK: 29($12)+102($7)=$348+$714=$1062<br><BR>\n" );
document.write( "Using formal algebra....<br><BR>\n" );
document.write( "x = # of adults<BR>\n" );
document.write( "131-x = # of children<br><BR>\n" );
document.write( "The total cost, at $12 per adult and $7 per child, was $1042:<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=12x%2B7%28131-x%29=1062 ALIGN=MIDDLE  ALT=\"12x%2B7%28131-x%29=1062\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=12x%2B917-7x=1062 ALIGN=MIDDLE  ALT=\"12x%2B917-7x=1062\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5x=145 ALIGN=MIDDLE  ALT=\"5x=145\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=29 ALIGN=MIDDLE  ALT=\"x=29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "Adults: x = 29<BR>\n" );
document.write( "Children: 131-x = 102<br><BR>\n" );
document.write( "Note that with this method of solving the problem using formal algebra, the calculations are exactly the same as with the informal method.<br><BR>\n" );
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