document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=951997>Question 951997</A>: <I><SPAN STYLE=\"word-break: break-all;\"> i need help soving each system of linear equations bysubstitution<BR>\n" );
document.write( "-4x+y=6<BR>\n" );
document.write( "-5x-y=21 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #581393 by </B><A HREF=/tutors/aboutme.mpl?userid=macston><B>macston(5194)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=macston><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=macston><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=581393\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Solve second equation for x<BR>\n" );
document.write( "-5x=y+21<BR>\n" );
document.write( "x=(y+21)/-5 Substitute for x in first equation.<BR>\n" );
document.write( "-4((y+21)/-5)+y=6<BR>\n" );
document.write( ".8y+16.8+y=6 Subtract 16.8 from each side.<BR>\n" );
document.write( "1.8y=-10.8 Divide each side by 1.8.<BR>\n" );
document.write( "y=-6 ANSWER 1: y=-6 Substitute for y in first equation.<BR>\n" );
document.write( "-4x+y=6<BR>\n" );
document.write( "-4x-6=6<BR>\n" );
document.write( "-4x=12<BR>\n" );
document.write( "x=-3 ANSWER 2: x=-3 <BR>\n" );
document.write( "CHECK:<BR>\n" );
document.write( "-5x-y=21<BR>\n" );
document.write( "-5(-3)-(-6)=21<BR>\n" );
document.write( "15-(-6)=21 <BR>\n" );
document.write( "21=21 \r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );