document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=766400>Question 766400</A>: <I><SPAN STYLE=\"word-break: break-all;\"> d+e-f=10<BR>\n" );
document.write( "e=f+d+2<BR>\n" );
document.write( "f=2e-7\r<BR>\n" );
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document.write( "Solve with substitution<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #466891 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39618)</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=466891\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> First using the f= equation, having only two of the variables, to substitute into the first two equations may be easiest.\r<BR>\n" );
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document.write( "d+e+(2e-7)=10 and e=(2e-7)+d+2<BR>\n" );
document.write( "d+3e-7=10  and e=2e+d-5<BR>\n" );
document.write( "d+3e=17   and 0=e+d-5<BR>\n" );
document.write( "d=17-3e.  <BR>\n" );
document.write( "Let's use this formula for d and substitute into the 0= equation.\r<BR>\n" );
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document.write( "0=e+(17-3e)-5<BR>\n" );
document.write( "0=-2e+17-5<BR>\n" );
document.write( "-2e=5-17<BR>\n" );
document.write( "2e=17-5=15<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=e=15%2F2 ALIGN=MIDDLE  ALT=\"e=15%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Maybe now would be easiest to find f.<BR>\n" );
document.write( "f=2(e)-7 and you just found e...\r<BR>\n" );
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document.write( "...<BR>\n" );
document.write( "continue...? </SPAN>\n" );
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