document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=689019>Question 689019</A>: <I><SPAN STYLE=\"word-break: break-all;\"> PLEASE HELP .. I'm trying to help my son w/his hw.. <BR>\n" );
document.write( "I need answers/solutions to refresh my memory !! <BR>\n" );
document.write( "1. x+y=4, 2x+y=5<BR>\n" );
document.write( "2. x-y=5, 2x+3y=0<BR>\n" );
document.write( "3. x-y=-2, x+y=4<BR>\n" );
document.write( "4. y=x+3 (5,0)<BR>\n" );
document.write( "5. y=2x+3 (-4,1) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #425822 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=425822\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 1. <BR>\n" );
document.write( " x + y = 4<BR>\n" );
document.write( "2x + y = 5<BR>\n" );
document.write( "------------subtraction eliminates y, find x<BR>\n" );
document.write( "-x = -1<BR>\n" );
document.write( "x = 1<BR>\n" );
document.write( "find y<BR>\n" );
document.write( "1 + y = 4<BR>\n" );
document.write( "y = 4 - 1<BR>\n" );
document.write( "y = 3<BR>\n" );
document.write( "Check solution of x=1; y=3, in the 2nd equation<BR>\n" );
document.write( "2(1) + 3 = 5<BR>\n" );
document.write( ":<BR>\n" );
document.write( "2. <BR>\n" );
document.write( " x - y = 5<BR>\n" );
document.write( "2x + 3y = 0<BR>\n" );
document.write( "Use substitution with the first equation here<BR>\n" );
document.write( "x - y = 5<BR>\n" );
document.write( "x = y+5<BR>\n" );
document.write( "replace x with y+5 in the 2nd equation<BR>\n" );
document.write( "2(y+5) + 3y = 0<BR>\n" );
document.write( "2y + 10 + 3y = 0<BR>\n" );
document.write( "2y + 3y = -10<BR>\n" );
document.write( "5y = -10<BR>\n" );
document.write( "y = -10/5<BR>\n" );
document.write( "y = -2<BR>\n" );
document.write( "find x using x = y + 5<BR>\n" );
document.write( "x = -2 + 5 <BR>\n" );
document.write( "x = 3<BR>\n" );
document.write( "check solution of x=3; y=-2 in the 2nd equation<BR>\n" );
document.write( "2(3) + 3(-2) = 0<BR>\n" );
document.write( "6 - 6 = 0<BR>\n" );
document.write( ":<BR>\n" );
document.write( "3.<BR>\n" );
document.write( " x - y = -2<BR>\n" );
document.write( " x + y = 4<BR>\n" );
document.write( "----------------addition eliminates y, find x<BR>\n" );
document.write( "2x = 2<BR>\n" );
document.write( "x = 1<BR>\n" );
document.write( "I'll let you find y, check your solutions in both equations<BR>\n" );
document.write( ":<BR>\n" );
document.write( "I'm not sure what (5,0) or (-4,1) mean here, they can't be an x/y pair<BR>\n" );
document.write( "4. y = x + 3 (5,0)<BR>\n" );
document.write( "5. y = 2x + 3 (-4,1) </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );