document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=240544>Question 240544</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me solve using the substitution method<BR>\n" );
document.write( "7x+3y=-25\r<BR>\n" );
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document.write( "-7x+y=29 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #176264 by </B><A HREF=/tutors/aboutme.mpl?userid=unlockmath><B>unlockmath(1688)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=unlockmath><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=unlockmath><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=176264\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Hello, <BR>\n" );
document.write( "Let's take the second equation and get y alone. To do that we add 7x to both sides. That will give us: <BR>\n" );
document.write( "y=7x+29  Now we can put this into the first equation:<BR>\n" );
document.write( "7x+3(7x+29)=-25  Distribute and combine like terms we get:<BR>\n" );
document.write( "28x + 87=-25    Now subtract 87 from both sides gives us: <BR>\n" );
document.write( "28x = -112   Divide both sides by 28 gives us: <BR>\n" );
document.write( "x = -4    To find y just plug -4 into either equation and we get:<BR>\n" );
document.write( "y=1  To see if these are right plug both values into both equations and it should come out the same. <BR>\n" );
document.write( "RJ Toftness<BR>\n" );
document.write( "www.math-unlock.com </SPAN>\n" );
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