document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=144945>Question 144945</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0131482874/algebrahomeworkh>Toby Slater beginning Algebra</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> what is the system of equations by the substitution method of this please help me understand  :(<BR>\n" );
document.write( "4x + 2y =4<BR>\n" );
document.write( "3x + y =4 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #105630 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=105630\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The substitution method is eliminating one of the variables by substituting, or replacing it, with an expression of the other variable.<BR>\n" );
document.write( "In these 2 equations, it's easy to solve for y in the 2nd eqn: y = 4-3x.<BR>\n" );
document.write( "Then, substitute that for y in the 1st eqn<BR>\n" );
document.write( "4x + 2(4-3x) = 4<BR>\n" );
document.write( "Now you have only x, so solve for it.<BR>\n" );
document.write( "4x + 8 -6x = 4<BR>\n" );
document.write( "-2x + 8 = 4<BR>\n" );
document.write( "-2x = -4<BR>\n" );
document.write( "x = 2<BR>\n" );
document.write( "Then, y = 4 - 3x<BR>\n" );
document.write( "y = 4 - 6<BR>\n" );
document.write( "y = -2<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );