document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=845736>Question 845736</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Can someone help me understand this please? \r<BR>\n" );
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document.write( "Solve each system by substitution. State the x-value of the solution.<BR>\n" );
document.write( "x+4y=11<BR>\n" );
document.write( "2x-5y=-4\r<BR>\n" );
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document.write( "A. -3 B. -2 C. 2 D. 3 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #509457 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=509457\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Solve each system by substitution. State the x-value of the solution.<BR>\n" );
document.write( "x + 4y = 11<BR>\n" );
document.write( "2x- 5y = -4<BR>\n" );
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document.write( "We will use the 1st equation for substitution in the 2nd equation<BR>\n" );
document.write( "x + 4y = 11<BR>\n" );
document.write( "subtract 4y from both sides<BR>\n" );
document.write( "x = -4y+11<BR>\n" );
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document.write( "2x - 5y = -4<BR>\n" );
document.write( "substitute (-4y+11) for x in the 2nd equation<BR>\n" );
document.write( "2(-4y+11) - 5y = -4<BR>\n" );
document.write( "-8y + 22 - 5y = -4<BR>\n" );
document.write( "-8y - 5y = -4 - 22<BR>\n" );
document.write( "-13y = -26 <BR>\n" );
document.write( "y has to be positive, multiply both sides by -1<BR>\n" );
document.write( "13y = 26<BR>\n" );
document.write( "y = 26/13<BR>\n" );
document.write( "y = 2<BR>\n" );
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document.write( "They want the value of x; use the equation: x - -4y+ 11, replace y with 2<BR>\n" );
document.write( "x = -4(2) + 11<BR>\n" );
document.write( "x = -8 + 11<BR>\n" );
document.write( "x = 3<BR>\n" );
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document.write( "You can check these solutions in the original equations<BR>\n" );
document.write( "Are you understanding this better now? </SPAN>\n" );
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