document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=853441>Question 853441</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I am working on Algebra, Systems of Equations and Inequalities. I am very confused. The question is\r<BR>\n" );
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document.write( "SUBSTITUTION<BR>\n" );
document.write( "Use substitution to solve each system of equations.\r<BR>\n" );
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document.write( "<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( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2x%2B3y=15+ ALIGN=MIDDLE  ALT=\"+2x%2B3y=15+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( " x=<BR>\n" );
document.write( " y= \r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+x-2y=4+ ALIGN=MIDDLE  ALT=\"+x-2y=4+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+3x=6y%2B12+ ALIGN=MIDDLE  ALT=\"+3x=6y%2B12+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( " x= <BR>\n" );
document.write( " y= \r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+x=5y-2+ ALIGN=MIDDLE  ALT=\"+x=5y-2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2x%2B2y=4+ ALIGN=MIDDLE  ALT=\"+2x%2B2y=4+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( " x= <BR>\n" );
document.write( " y=  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #514095 by </B><A HREF=/tutors/aboutme.mpl?userid=JulietG><B>JulietG(1812)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=JulietG><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=JulietG><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=514095\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let's look at the first one.<BR>\n" );
document.write( "x = 3y<BR>\n" );
document.write( "2x + 3y = 15<BR>\n" );
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document.write( "To solve this using substitution, take the known value of X from the first equation and put it into the second equation.<BR>\n" );
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document.write( "2x + 3y = 15<BR>\n" );
document.write( "2(3y) + 3y = 15 (substituted the 3y in place of the X)<BR>\n" );
document.write( "Multiply<BR>\n" );
document.write( "6y + 3y = 15<BR>\n" );
document.write( "Add<BR>\n" );
document.write( "9y = 15<BR>\n" );
document.write( "Divide each side by 9<BR>\n" );
document.write( "Y = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=15%2F9 ALIGN=MIDDLE  ALT=\"15%2F9\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "If y = 1<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%2F3 ALIGN=MIDDLE  ALT=\"2%2F3\"   DISABLED_style= \"max-width:90%; height:auto;\" >, then x = 3 * 1<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%2F3 ALIGN=MIDDLE  ALT=\"2%2F3\"   DISABLED_style= \"max-width:90%; height:auto;\" >, or 5 [x=3y from the first equation]<BR>\n" );
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document.write( "Use the same method to solve the others.  If you need further help, please post questions one at a time. </SPAN>\n" );
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