document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=80293>Question 80293</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0078603900/algebrahomeworkh>Algebra I</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\">     Use substitution to solve each system of equations. If the system does not have exactly one solution, state whether it has no solution or infinitely many solutions.\r<BR>\n" );
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document.write( "x-3y=0<BR>\n" );
document.write( "3x+y=7 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #57616 by </B><A HREF=/tutors/aboutme.mpl?userid=sofiyacherni><B>sofiyacherni(99)</B></A><img src=\"/images/stars/stars-08.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=sofiyacherni><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=57616\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> from first equation you want to move 3y to the other side so technically you want to add 3y to both sides so that 3y on the left of equal signs becomes zero<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x-3y%2B3y=0%2B3y ALIGN=MIDDLE  ALT=\"x-3y%2B3y=0%2B3y\"   DISABLED_style= \"max-width:90%; height:auto;\" > so *** <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=3y ALIGN=MIDDLE  ALT=\"x=3y\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "now that you have a formula for x you have to substitute it in the second equation<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3%283y%29%2By=7 ALIGN=MIDDLE  ALT=\"3%283y%29%2By=7\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=9y%2By=7 ALIGN=MIDDLE  ALT=\"9y%2By=7\"   DISABLED_style= \"max-width:90%; height:auto;\" > so 9y+1y=10y, then<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10y=7 ALIGN=MIDDLE  ALT=\"10y=7\"   DISABLED_style= \"max-width:90%; height:auto;\" > in order for you to get y by itself you have to divide both sides by 10, thus<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%2810y%29%2F10=7%2F10 ALIGN=MIDDLE  ALT=\"%2810y%29%2F10=7%2F10\"   DISABLED_style= \"max-width:90%; height:auto;\" > two tens on the left cancel out and you are left with<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=7%2F10 ALIGN=MIDDLE  ALT=\"y=7%2F10\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "now that you have a value for y go back to equation marked *** and substitute <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=7%2F10 ALIGN=MIDDLE  ALT=\"7%2F10\"   DISABLED_style= \"max-width:90%; height:auto;\" > for y to find the value for x, you get<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=3%287%2F10%29=21%2F10 ALIGN=MIDDLE  ALT=\"x=3%287%2F10%29=21%2F10\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "thus your answer is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=21%2F10 ALIGN=MIDDLE  ALT=\"x=21%2F10\"   DISABLED_style= \"max-width:90%; height:auto;\" > and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=7%2F10 ALIGN=MIDDLE  ALT=\"y=7%2F10\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Good Luck </SPAN>\n" );
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