document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=90937>Question 90937</A>: <I><SPAN STYLE=\"word-break: break-all;\"> page 718 of chapter 8 section 3 question #16  #18 #28  #38<BR>\n" );
document.write( "I am double checking my work and noticed after doing these 4 yesterday, they are confusing the heck out of me today. Can you explain how to solve these so I can refresh my mind and be assured that I done them properly before I turn in my assignments today? (I am giving four different styles)<BR>\n" );
document.write( "#16 solve by substitution  5x-2y=-5 then y-5x=3   now question #20 solve by substitution  8x-4y=16 then y=2x-4   now question #28 solve by substitution   4x-12y=5  then -x+3y=-1   and question #38 solve by either addition or substitution. If a unique solution does not exist, stste wether it is dependent or inconsistent. 10x+2y=7 and y=-5x+3    THANKS!      My answers that I had for #16 was x=-1/5  and y=2 then I did it over today and got x =0.6 and y =4  so I am just lost now. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #66024 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=66024\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> #16 solve by substitution <BR>\n" );
document.write( "1st:5x-2y=-5 <BR>\n" );
document.write( "2nd: y-5x=3 <BR>\n" );
document.write( "--------------<BR>\n" );
document.write( "Rewrite as:<BR>\n" );
document.write( "1st: 5x-2y=-5<BR>\n" );
document.write( "3rd: y = 5x+3<BR>\n" );
document.write( "------------<BR>\n" );
document.write( "Substitute 3rd into 1st to get:<BR>\n" );
document.write( "4th: 5x-2(5x+3) = -5<BR>\n" );
document.write( "5x-10x-6 = -5<BR>\n" );
document.write( "-5x=1<BR>\n" );
document.write( "x= -1/5<BR>\n" );
document.write( "-------------<BR>\n" );
document.write( "Substitute into 3rd to solve for y:<BR>\n" );
document.write( "y = 5(-1/5)+3<BR>\n" );
document.write( "y = -1+3<BR>\n" );
document.write( "y = 2<BR>\n" );
document.write( "==================<BR>\n" );
document.write( "Check your answer in 1st:<BR>\n" );
document.write( "1st: 5x-2y=-5<BR>\n" );
document.write( "5(-1/5)-2(2)= -5<BR>\n" );
document.write( "-1-4=-5<BR>\n" );
document.write( "-5=-5<BR>\n" );
document.write( "It checks.  You could do this on each of your other problems.<BR>\n" );
document.write( "============<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );