document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=880336>Question 880336</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need help with this logarithm problem:\r<BR>\n" );
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document.write( "Solve for x in terms of y.\r<BR>\n" );
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document.write( "y = (10^x - 10^-x) / (10^x + 10^-x)\r<BR>\n" );
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document.write( "Thank you! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #531374 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39625)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=531374\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let me abbreviate the first few steps through description:\r<BR>\n" );
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document.write( "Multiply the right-hand side by <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%2810%5Ex%29%2F%2810%5Ex%29 ALIGN=MIDDLE  ALT=\"%2810%5Ex%29%2F%2810%5Ex%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, and simplify.<BR>\n" );
document.write( "Multiply left and right sides by <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10%5E%282x%29%2B1 ALIGN=MIDDLE  ALT=\"10%5E%282x%29%2B1\"   DISABLED_style= \"max-width:90%; height:auto;\" >.<BR>\n" );
document.write( "After some use of Distributive Property and use of additive inverse property, you should obtain:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10%5E%282x%29=%28y%2B1%29%2F%281-y%29 ALIGN=MIDDLE  ALT=\"10%5E%282x%29=%28y%2B1%29%2F%281-y%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Then taking common logs of both sides, obtain<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28x=%281%2F2%29log%2810%2C%28%28y%2B1%29%2F%281-y%29%29%29%29 ALIGN=MIDDLE  ALT=\"highlight%28x=%281%2F2%29log%2810%2C%28%28y%2B1%29%2F%281-y%29%29%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "or<BR>\n" );
document.write( "to make that easier to read when rendered, just understand COMMON LOGS,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28x=%281%2F2%29log%28%28%28y%2B1%29%2F%281-y%29%29%29%29 ALIGN=MIDDLE  ALT=\"highlight%28x=%281%2F2%29log%28%28%28y%2B1%29%2F%281-y%29%29%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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