document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=940462>Question 940462</A>: <I><SPAN STYLE=\"word-break: break-all;\"> solve the equation\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%2810%5Ey+%2B+9%29=+18-19%281-10%5Ey%29 ALIGN=MIDDLE  ALT=\"2%2810%5Ey+%2B+9%29=+18-19%281-10%5Ey%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "y=?\r<BR>\n" );
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document.write( "round answer to 3 decimal places  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #573161 by </B><A HREF=/tutors/aboutme.mpl?userid=laoman><B>laoman(51)</B></A><img src=\"/images/stars/stars-08.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=laoman><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=laoman><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=573161\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> \r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%2810%5Ey+%2B+9%29=+18-19%281-10%5Ey%29 ALIGN=MIDDLE  ALT=\"2%2810%5Ey+%2B+9%29=+18-19%281-10%5Ey%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10%5Ey+=+a ALIGN=MIDDLE  ALT=\"10%5Ey+=+a\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Therefore, let's substitute into the equation<BR>\n" );
document.write( "2(a+9)=18-19(1-a)<BR>\n" );
document.write( "2*a +18 = 18 -19+19*a<BR>\n" );
document.write( "2*a-19*a = -1-18<BR>\n" );
document.write( "-17*a= -19<BR>\n" );
document.write( "a = 19/17<BR>\n" );
document.write( "but 10^y = a<BR>\n" );
document.write( "10^y = 19/17<BR>\n" );
document.write( "Using logarith to solve<BR>\n" );
document.write( "y*log 10 = log (19/17)<BR>\n" );
document.write( "y= log (19/17)/log10<BR>\n" );
document.write( "y = log(19/17) since log10 =1<BR>\n" );
document.write( "y= 0.0483046<BR>\n" );
document.write( "y= 0.048 ( to 3 d.p)\r<BR>\n" );
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document.write( "QED </SPAN>\n" );
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