document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=155517>Question 155517</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me answer this: abs(4a+7)<13<BR>\n" );
document.write( "I got -5<a<3/7. I am not sure if this is right. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #114539 by </B><A HREF=/tutors/aboutme.mpl?userid=Adam><B>Adam(64)</B></A><img src=\"/images/stars/stars-08.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Adam><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=114539\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Actually, it is right only partially. 3/7 is wrong, let me show you why.<BR>\n" );
document.write( "we start with <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=abs%284a%2B7%29+%3C+13 ALIGN=MIDDLE  ALT=\"abs%284a%2B7%29+%3C+13\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "there are two cases, expression under absolute value (4a+7) can be negative, or nonnegative. If it is nonnegative there is no change to the equation, thus we can rewrite it as <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4a%2B7%3C13 ALIGN=MIDDLE  ALT=\"4a%2B7%3C13\"   DISABLED_style= \"max-width:90%; height:auto;\" > and solve:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4a%2B7%3C13 ALIGN=MIDDLE  ALT=\"4a%2B7%3C13\"   DISABLED_style= \"max-width:90%; height:auto;\" > //-7<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4a%3C6 ALIGN=MIDDLE  ALT=\"4a%3C6\"   DISABLED_style= \"max-width:90%; height:auto;\" > //:4<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a%3C6%2F4 ALIGN=MIDDLE  ALT=\"a%3C6%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" > => <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a+%3C+3%2F2 ALIGN=MIDDLE  ALT=\"a+%3C+3%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Cheers,\r<BR>\n" );
document.write( "\n" );
document.write( "Adam </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );