document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=309381>Question 309381</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I do not have a very large understanding of logarithms, and i can't solve the question:\r<BR>\n" );
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document.write( "log 7 + log x = 2\r<BR>\n" );
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document.write( "(The answer is 100/7)\r<BR>\n" );
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document.write( "I can solve things such as log x - log 6 = log 15 without having to worry about the base 10, but i do not understand when i need to use it to get the right answer.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #221277 by </B><A HREF=/tutors/aboutme.mpl?userid=Earlsdon><B>Earlsdon(6294)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Earlsdon><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=221277\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Solve for x:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Log%287%29%2BLog%28x%29+=+2 ALIGN=MIDDLE  ALT=\"Log%287%29%2BLog%28x%29+=+2\"   DISABLED_style= \"max-width:90%; height:auto;\" > First, apply the \"product rule\" for logarithms: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Log%28M%29%2BLog%28N%29+=+Log%28M%2AN%29 ALIGN=MIDDLE  ALT=\"Log%28M%29%2BLog%28N%29+=+Log%28M%2AN%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Log%287%2Ax%29+=+2 ALIGN=MIDDLE  ALT=\"Log%287%2Ax%29+=+2\"   DISABLED_style= \"max-width:90%; height:auto;\" > Now write this in exponential form: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Log%5Bb%5D%28x%29+=+y ALIGN=MIDDLE  ALT=\"Log%5Bb%5D%28x%29+=+y\"   DISABLED_style= \"max-width:90%; height:auto;\" >---><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=b%5Ey+=+x ALIGN=MIDDLE  ALT=\"b%5Ey+=+x\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10%5E2+=+7%2Ax ALIGN=MIDDLE  ALT=\"10%5E2+=+7%2Ax\"   DISABLED_style= \"max-width:90%; height:auto;\" > Divide both sides by 7.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10%5E2%2F7+=+x ALIGN=MIDDLE  ALT=\"10%5E2%2F7+=+x\"   DISABLED_style= \"max-width:90%; height:auto;\" > S0...<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28x+=+100%2F7%29 ALIGN=MIDDLE  ALT=\"highlight%28x+=+100%2F7%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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