document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=490930>Question 490930</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hi,<BR>\n" );
document.write( "This is pretty basic, but I have forgotten my algebra.<BR>\n" );
document.write( "I wish to substitute in ohm's law formulae to find soultions for power. <BR>\n" );
document.write( "given.  E=IR and P=EI<BR>\n" );
document.write( "In an electrical circuit only P and R are known.  Solve for E and Solve for I.<BR>\n" );
document.write( "I know the answers are E=&#8730;PR  and I=&#8730;P/R but I don't remember how to solve for them. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #334461 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=334461\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> given. E=IR and P=EI<BR>\n" );
document.write( "In an electrical circuit only P and R are known. Solve for E and Solve for I.<BR>\n" );
document.write( ":<BR>\n" );
document.write( "E = I*R<BR>\n" );
document.write( "R = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=E%2FI ALIGN=MIDDLE  ALT=\"E%2FI\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "I = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=E%2FR ALIGN=MIDDLE  ALT=\"E%2FR\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( ":<BR>\n" );
document.write( "solving for E using P & R<BR>\n" );
document.write( " EI = P<BR>\n" );
document.write( " E = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=P%2FI ALIGN=MIDDLE  ALT=\"P%2FI\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Replace I with (E/R)<BR>\n" );
document.write( " E = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=P%2F%28E%2FR%29 ALIGN=MIDDLE  ALT=\"P%2F%28E%2FR%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "which is<BR>\n" );
document.write( " E = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28PR%29%2FE ALIGN=MIDDLE  ALT=\"%28PR%29%2FE\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "multiply both sides by E<BR>\n" );
document.write( "E^2 = PR<BR>\n" );
document.write( "Find the square root of both sides<BR>\n" );
document.write( "E = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%28PR%29 ALIGN=MIDDLE  ALT=\"sqrt%28PR%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( ":<BR>\n" );
document.write( "Solving for I using P & R<BR>\n" );
document.write( "EI = P<BR>\n" );
document.write( " I = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=P%2FE ALIGN=MIDDLE  ALT=\"P%2FE\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Replace E with IR<BR>\n" );
document.write( " I = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=P%2F%28IR%29 ALIGN=MIDDLE  ALT=\"P%2F%28IR%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "multiply both sides by I<BR>\n" );
document.write( "I^2 = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=P%2FR ALIGN=MIDDLE  ALT=\"P%2FR\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Find the square root of both sides<BR>\n" );
document.write( "I = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%28P%2FR%29 ALIGN=MIDDLE  ALT=\"sqrt%28P%2FR%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( ":<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );