document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1009971>Question 1009971</A>: <I><SPAN STYLE=\"word-break: break-all;\"> SGT Patrick missed four problems on his math midterm and received a score of 80%. How many problems were on the test? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #625452 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><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=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=625452\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x = number of problems on the test.\r<BR>\n" );
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document.write( "4 problems wrong means x-4 problems right.\r<BR>\n" );
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document.write( "(x-4)/x = .8\r<BR>\n" );
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document.write( "multiply both sides of this equation by x to get x-4 = .8x.\r<BR>\n" );
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document.write( "subtract .8x from both sides of this equation and add 4 to both sides of this equation to get x - .8x = 4\r<BR>\n" );
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document.write( "combine like terms to get  .2x = 4\r<BR>\n" );
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document.write( "divide both sides of this equation by .2 to get x = 4/.2 = 20.\r<BR>\n" );
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document.write( "there were 20 problems on the test.\r<BR>\n" );
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document.write( "he mised 4 so he got 16 right.\r<BR>\n" );
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document.write( "16/20 = 8/10 = .8 * 100 = 80%\r<BR>\n" );
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document.write( "you could also have just figured out that if he got 80% right, then he must have gotten 20% wrong.\r<BR>\n" );
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document.write( "20% wrong = 4\r<BR>\n" );
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document.write( "x = total on test.\r<BR>\n" );
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document.write( ".20 * x = 4\r<BR>\n" );
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document.write( "divide both sides by .20 and you get x = 4/.2 = 20.\r<BR>\n" );
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document.write( " </SPAN>\n" );
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