document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1190592>Question 1190592</A>: <I><SPAN STYLE=\"word-break: break-all;\"> on monday, revlien paid 66 pesos for 3 doughnuts and 2 cups of coffee. on tuesday, she paid 69 pesos for 2 doughnuts and 3 cups of coffee. how much did he pay for 1 doughnut and 1 cup of coffee on a wednesday?<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #822297 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(52858)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><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=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=822297\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .<BR>\n" );
document.write( "on monday, revlien paid 66 pesos for 3 doughnuts and 2 cups of coffee. <BR>\n" );
document.write( "on tuesday, she paid 69 pesos for 2 doughnuts and 3 cups of coffee. <BR>\n" );
document.write( "how much did he pay for 1 doughnut and 1 cup of coffee on a wednesday?<BR>\n" );
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document.write( "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This problem is intended for mental solution.\r<BR>\n" );
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document.write( "Add her purchases on Monday and Tuesday:\r\n" );
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document.write( "    she bought 3+2 = 5 doughnuts and 2+3 = 5 cups of coffee, in total,\r\n" );
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document.write( "    spending 66 + 69 = 135 pesos.\r\n" );
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document.write( "HENCE, one doughnut and one cup of coffee cost  1/5  of it, i.e.  135/5 = 27 pesos.   \r\n" );
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document.write( "<U>ANSWER</U>.  On Wednesday, she must pay 27 pesos.\r\n" );
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document.write( "Solved.\r<BR>\n" );
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document.write( "Notice that I did not solve any systems of equations.\r<BR>\n" );
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document.write( "I even did not write them.\r<BR>\n" );
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document.write( "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;It is a classic type of problems, that seem to be solved \r<BR>\n" );
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document.write( "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;using equations, &nbsp;but actually &nbsp;MUST &nbsp;be solved mentally.\r<BR>\n" );
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document.write( "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Solving mentally is a &nbsp;GOOD &nbsp;STYLE &nbsp;solving such problems.\r<BR>\n" );
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document.write( "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;It is what the teachers expect to get from their students,\r<BR>\n" );
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document.write( "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;when they give them such problems.\r<BR>\n" );
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document.write( "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;It is what the interviewers expect to get from the candidates\r<BR>\n" );
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document.write( "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;when they interview them somewhere in &nbsp;Microsoft or &nbsp;Google.\r<BR>\n" );
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document.write( "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;But the final goal of teachers, &nbsp;when they give such problems, &nbsp;is to develop\r<BR>\n" );
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document.write( "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;the student's mind &nbsp;FLEXIBLE &nbsp;and &nbsp;CREATIVE, &nbsp;instead of making it dogmatic.\r<BR>\n" );
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