document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=999643>Question 999643</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hi. I have a test coming up and I'm studying for it. But I don't know how to solve it. Here is my question:<BR>\n" );
document.write( "For the following system, use the second equation to make a substitution for x in the first equation.<BR>\n" );
document.write( "x + 5 y - 10 = 0<BR>\n" );
document.write( "x = 2 y - 8<BR>\n" );
document.write( "What is the resulting equation in simplest form?<BR>\n" );
document.write( "My options were <BR>\n" );
document.write( "-3 y - 18 = 0<BR>\n" );
document.write( "3 y - 18 = 0<BR>\n" );
document.write( "7 y - 18 = 0<BR>\n" );
document.write( "7 y + 18 = 0<BR>\n" );
document.write( "I don't know which one please help. And thank you to who ever helps </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #617219 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(52788)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><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=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=617219\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .<BR>\n" );
document.write( "For the following system, use the second equation to make a substitution for x in the first equation.<BR>\n" );
document.write( "x + 5*y - 10 = 0<BR>\n" );
document.write( "x = 2*y - 8<BR>\n" );
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document.write( "The second equation just expresses x via y. Substitute it into the first equation. You will get\r<BR>\n" );
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document.write( "(2y -8) + 5y - 10 = 0.\r<BR>\n" );
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document.write( "Simplify and solve it for y.\r<BR>\n" );
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document.write( "7y = 18,\r<BR>\n" );
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document.write( "y = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=18%2F7 ALIGN=MIDDLE  ALT=\"18%2F7\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
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document.write( "Now, substitute this value of y into the second equation of the original system. You will get\r<BR>\n" );
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document.write( "x = 2*<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=18%2F7%29 ALIGN=MIDDLE  ALT=\"18%2F7%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > - <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=8 ALIGN=MIDDLE  ALT=\"8\"   DISABLED_style= \"max-width:90%; height:auto;\" > = . . . \r<BR>\n" );
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document.write( "Please complete calculations yourself.\r<BR>\n" );
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document.write( "Do not forget to check the solution after completing.\r<BR>\n" );
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document.write( " </SPAN>\n" );
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