document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=516859>Question 516859</A>: <I><SPAN STYLE=\"word-break: break-all;\"> -7x+3y=52<BR>\n" );
document.write( "15x+6y=-12\r<BR>\n" );
document.write( "\n" );
document.write( "Please help! I am supposed to solve this by substitution, and I have no idea how to do it!<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #344525 by </B><A HREF=/tutors/aboutme.mpl?userid=Maths68><B>Maths68(1474)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Maths68><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=Maths68><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=344525\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> -7x+3y=52................(1)<BR>\n" );
document.write( "15x+6y=-12..............(2)\r<BR>\n" );
document.write( "\n" );
document.write( "Take (1)<BR>\n" );
document.write( "-7x+3y=52................(1)<BR>\n" );
document.write( "3y=52+7x<BR>\n" );
document.write( "3y/3=(52+7x)/3<BR>\n" );
document.write( "y=(52+7x)/3<BR>\n" );
document.write( "Put the above value of y in (2)<BR>\n" );
document.write( "15x+6y=-12<BR>\n" );
document.write( "15x+6((52+7x)/3)=-12<BR>\n" );
document.write( "15x+2((52+7x)=-12<BR>\n" );
document.write( "15x+104+14x=-12<BR>\n" );
document.write( "29x=-12-104<BR>\n" );
document.write( "29x=-116<BR>\n" );
document.write( "29x/29=-116/29<BR>\n" );
document.write( "x=-116/29<BR>\n" );
document.write( "Put the value of x in (1)<BR>\n" );
document.write( "-7x+3y=52................(1)<BR>\n" );
document.write( "-7(-116/29)+3y=52<BR>\n" );
document.write( "(812/29)+3y=52<BR>\n" );
document.write( "3y=52-(812/29)<BR>\n" );
document.write( "3y=(1508-812)/29<BR>\n" );
document.write( "3y=696/29<BR>\n" );
document.write( "3y=24<BR>\n" );
document.write( "3y/3=24/3<BR>\n" );
document.write( "y=8\r<BR>\n" );
document.write( "\n" );
document.write( "x,y = -116/29, 8\r<BR>\n" );
document.write( "\n" );
document.write( "Check \r<BR>\n" );
document.write( "\n" );
document.write( "put the values of x and y in (1)<BR>\n" );
document.write( "-7x+3y=52................(1)<BR>\n" );
document.write( "-7(-116/29)+3(8)=52<BR>\n" );
document.write( "812/29+24=52<BR>\n" );
document.write( "(812+696)/29=52<BR>\n" );
document.write( "1508/29=52<BR>\n" );
document.write( "1508=52*29<BR>\n" );
document.write( "1508=1508 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );