document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=69687>Question 69687</A>: <I><SPAN STYLE=\"word-break: break-all;\"> My child has a maths question in Foundation of Mathematics by A J Sadler and the answer in the book = 50. I do not get that answer but my child can using calculator equations. My child needs to understand the method and I do not know where I'm going wrong. I can normally work these problem out but I need help with this one:\r<BR>\n" );
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document.write( "1/R = 1/R1 + 1/R2 + 1/R3 where R = 20, R2 = 40 and R3 = 200\r<BR>\n" );
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document.write( "1/20 = 1/R1 + 1/40 + 1/200<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #49636 by </B><A HREF=/tutors/aboutme.mpl?userid=funmath><B>funmath(2933)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=funmath><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=49636\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> My child has a maths question in Foundation of Mathematics by A J Sadler and the answer in the book = 50. I do not get that answer but my child can using calculator equations. My child needs to understand the method and I do not know where I'm going wrong. I can normally work these problem out but I need help with this one:\r<BR>\n" );
document.write( "\n" );
document.write( "1/R = 1/R1 + 1/R2 + 1/R3 where R = 20, R2 = 40 and R3 = 200\r<BR>\n" );
document.write( "\n" );
document.write( "1/20 = 1/R1 + 1/40 + 1/200<BR>\n" );
document.write( "The LCD is 200R1, multiply everything by 200 to clear the fractions.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=200R%5B1%5D%281%2F20%29=200R%5B1%5D%281%2FR%5B1%5D%29%2B200R%5B1%5D%281%2F40%29%2B200R%5B1%5D%281%2F200%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10R%5B1%5D=200%2B5R%5B1%5D%2BR%5B1%5D ALIGN=MIDDLE  ALT=\"10R%5B1%5D=200%2B5R%5B1%5D%2BR%5B1%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10R%5B1%5D=200%2B6R%5B1%5D ALIGN=MIDDLE  ALT=\"10R%5B1%5D=200%2B6R%5B1%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10R%5B1%5D-6R%5B1%5D=200%2B6R%5B1%5D-6R%5B1%5D ALIGN=MIDDLE  ALT=\"10R%5B1%5D-6R%5B1%5D=200%2B6R%5B1%5D-6R%5B1%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4R%5B1%5D=200 ALIGN=MIDDLE  ALT=\"4R%5B1%5D=200\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4R%5B1%5D%2F4=200%2F4 ALIGN=MIDDLE  ALT=\"4R%5B1%5D%2F4=200%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28R%5B1%5D=50%29 ALIGN=MIDDLE  ALT=\"highlight%28R%5B1%5D=50%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Happy Calculating!!!! </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );