document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=662280>Question 662280</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve the system by the substitution method\r<BR>\n" );
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document.write( "4x + y = 25<BR>\n" );
document.write( "3x + 4y= 22\r<BR>\n" );
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document.write( "the answer the teacher got was 5,10 <BR>\n" );
document.write( "but I can not figure out how to get there. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #412074 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=412074\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Solve the system by the substitution method\r<BR>\n" );
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document.write( "4x + y = 25 --> y = 25 - 4x<BR>\n" );
document.write( "3x + 4y= 22<BR>\n" );
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document.write( "Sub for y in the 2nd eqn<BR>\n" );
document.write( "3x + 4*(25-4x) = 22<BR>\n" );
document.write( "3x + 100 - 16x = 22<BR>\n" );
document.write( "-13x = -78<BR>\n" );
document.write( "x = 6<BR>\n" );
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document.write( "y = 25-4x<BR>\n" );
document.write( "y = 1<BR>\n" );
document.write( "--> (6,1)<BR>\n" );
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document.write( "If you sub (5,10), you'll see it doesn't fit<BR>\n" );
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