document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=720149>Question 720149</A>: <I><SPAN STYLE=\"word-break: break-all;\"> how can I solve this solve each system of equations by substitution method<BR>\n" );
document.write( "-3x+7y=14<BR>\n" );
document.write( "2x-y=-13 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #441687 by </B><A HREF=/tutors/aboutme.mpl?userid=lenny460><B>lenny460(1073)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lenny460><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=lenny460><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=441687\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> how can I solve this solve each system of equations by substitution method<BR>\n" );
document.write( "-3x+7y=14<BR>\n" );
document.write( "2x-y=-13\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "-3x + 7y = 14 (Equation 1)\r<BR>\n" );
document.write( "\n" );
document.write( "2x - y = -13 (Equation 2)\r<BR>\n" );
document.write( "\n" );
document.write( "2x - y = -13\r<BR>\n" );
document.write( "\n" );
document.write( "Subtract 2x from each side of the equation.\r<BR>\n" );
document.write( "\n" );
document.write( "2x - y - 2x = -13 - 2x\r<BR>\n" );
document.write( "\n" );
document.write( "-y = -13 - 2x\r<BR>\n" );
document.write( "\n" );
document.write( "Divide each item by -1\r<BR>\n" );
document.write( "\n" );
document.write( "-y/-1 = -13/-1 -2x/-1\r<BR>\n" );
document.write( "\n" );
document.write( "y = 13 + 2x or\r<BR>\n" );
document.write( "\n" );
document.write( "y = 2x + 13 (Equation 3)\r<BR>\n" );
document.write( "\n" );
document.write( "Substitute Equation 3 into Equation 1\r<BR>\n" );
document.write( "\n" );
document.write( "-3x + 7y = 14\r<BR>\n" );
document.write( "\n" );
document.write( "-3x + 7(2x + 13) = 14\r<BR>\n" );
document.write( "\n" );
document.write( "-3x + 14x + 91 = 14\r<BR>\n" );
document.write( "\n" );
document.write( "-3x + 14x = 11x\r<BR>\n" );
document.write( "\n" );
document.write( "11x + 91 = 14\r<BR>\n" );
document.write( "\n" );
document.write( "11x + 91 - 91 = 14 - 91\r<BR>\n" );
document.write( "\n" );
document.write( "11x = -77\r<BR>\n" );
document.write( "\n" );
document.write( "x = -7\r<BR>\n" );
document.write( "\n" );
document.write( "Substitute x = -7 into Equation 2\r<BR>\n" );
document.write( "\n" );
document.write( "2x - y = -13\r<BR>\n" );
document.write( "\n" );
document.write( "2(-7) - y = -13\r<BR>\n" );
document.write( "\n" );
document.write( "-14 - y = -13\r<BR>\n" );
document.write( "\n" );
document.write( "Add 14 to each side of the equation.\r<BR>\n" );
document.write( "\n" );
document.write( "-14 - y + 14 = -13 + 14\r<BR>\n" );
document.write( "\n" );
document.write( "-y = 1\r<BR>\n" );
document.write( "\n" );
document.write( "Divide each side by -1\r<BR>\n" );
document.write( "\n" );
document.write( "y = -1\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Answer:\r<BR>\n" );
document.write( "\n" );
document.write( "x = -7 and \r<BR>\n" );
document.write( "\n" );
document.write( "y = -1\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Lennox Obuong<BR>\n" );
document.write( "Algebra Tutor </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );