document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=203476>Question 203476</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 1.	Solve by substitution or elimination method: \r<BR>\n" );
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document.write( "              3x – 2y = 26<BR>\n" );
document.write( "             -7x + 3y = -49\r<BR>\n" );
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document.write( "2.	Solve by substitution or elimination method: \r<BR>\n" );
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document.write( "               4x – 5y = 14<BR>\n" );
document.write( "             -12x + 15y = -42\r<BR>\n" );
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document.write( "3.	Solve by substitution or elimination method: \r<BR>\n" );
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document.write( "              -2x + 6y = 19<BR>\n" );
document.write( "              10x – 30y = -15<BR>\n" );
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document.write( "Second set of problems:\r<BR>\n" );
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document.write( "1.	Plot the graph of the equations 2x - 3y = 5 and 4x - 6y = 21 and interpret the result. <BR>\n" );
document.write( "2.	Plot the graph of the equations 4x - 6y = 12 and x - 5y = 10 and interpret the result. <BR>\n" );
document.write( "3.	Plot the graph of the equations 8x - 4y = 12 and -4x + 2y = -6 and interpret the result.\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #153515 by </B><A HREF=/tutors/aboutme.mpl?userid=RAY100><B>RAY100(1637)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=RAY100><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=153515\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I),,(1)  3x-2y=26,,mult  by 3,,,9x-6y= 78<BR>\n" );
document.write( "(2)-7x +3y =-49,,,mult  by 2,,-14x+6y=-98 <BR>\n" );
document.write( "add(1) +(2),,,,,-5x=-20,,,,,x=4<BR>\n" );
document.write( "subst into  (1),,,3(4) -2y=26,,,,-2y=14,,,,y=-7<BR>\n" );
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document.write( "II),,,(1)4x-5y=14,,,mult  by (-3),,,-12x +15y =-42<BR>\n" );
document.write( "(2)  -12x +15y =-42<BR>\n" );
document.write( "as  (1)  and  (2)  are  coincident,,,,x=  all  real  numbers<BR>\n" );
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document.write( "III) (1) -2x -6y = 19,,,mult  by (-5),,,10x-30y=-95<BR>\n" );
document.write( "(2) 10x-30y=-15<BR>\n" );
document.write( "as  (1)  and  (2)  are  parallel(slopes  same),,,there  is  no  solution<BR>\n" );
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document.write( "(iv) (1)2x-3y=5,,,y= (2/3)x -5/3<BR>\n" );
document.write( "(2)  4x-6y=21,,,,,y=(2/3)x -7/2<BR>\n" );
document.write( "lines  are  parallel(slopes  same), y intercepts  are (-5/3)  and (-7/2)<BR>\n" );
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document.write( "(v)  (1) 4x-6y=12,,y=(2/3)x-2<BR>\n" );
document.write( "(2) x-5y=10,,,y=(1/5)x -2<BR>\n" );
document.write( "y intercepts  are  same,,therefore  lines  intercept  there(0,-2),,<BR>\n" );
document.write( "both  slopes  are  positive,  but  different.<BR>\n" );
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document.write( "(vi) (1) 8x -4y =12,,,,y=2x-3<BR>\n" );
document.write( "(2) -4x +2y =-6,,,y=2x-3<BR>\n" );
document.write( "lines  are  coincident,,,y intercept  is -3,,(0,-3),,slope  is  (+2)<BR>\n" );
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