document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=214187>Question 214187</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How do I do this linear equation by solving by substitution?\r<BR>\n" );
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document.write( "  y=x+3\r<BR>\n" );
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document.write( "  x+y=5 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #161774 by </B><A HREF=/tutors/aboutme.mpl?userid=drj><B>drj(1380)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=drj><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=drj><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=161774\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> \How do I do this linear equation by solving by substitution?\r<BR>\n" );
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document.write( "  y=x+3\r<BR>\n" );
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document.write( "  x+y=5\r<BR>\n" );
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document.write( "The following steps will solve the system of linear equations by substitution:\r<BR>\n" );
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document.write( " <TR><TD  ALIGN=MIDDLE>Solved by <A  rel=nofollow HREF=http://wiki.algebra.com/index.php/Tutoring_-_pluggable_solvers>pluggable</A> solver: <A  rel=nofollow HREF=linear_substitution.solver>SOLVE linear system by SUBSTITUTION</A></TD></TR>\n" );
document.write( "<TR><TD  ALIGN=LEFT>Solve:<BR>\n" );
document.write( "  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+system%28+%0D%0A++++-1%5Cx+%2B+1%5Cy+=+3%2C%0D%0A++++1%5Cx+%2B+1%5Cy+=+5+%29%0D%0A++ ALIGN=MIDDLE  ALT=\"+system%28+%0D%0A++++-1%5Cx+%2B+1%5Cy+=+3%2C%0D%0A++++1%5Cx+%2B+1%5Cy+=+5+%29%0D%0A++\"   DISABLED_style= \"max-width:90%; height:auto;\" >We'll use substitution. After moving 1*y to the right, we get:<BR>\n" );
document.write( "  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-1%2Ax+=+3+-+1%2Ay ALIGN=MIDDLE  ALT=\"-1%2Ax+=+3+-+1%2Ay\"   DISABLED_style= \"max-width:90%; height:auto;\" >, or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+3%2F-1+-+1%2Ay%2F-1 ALIGN=MIDDLE  ALT=\"x+=+3%2F-1+-+1%2Ay%2F-1\"   DISABLED_style= \"max-width:90%; height:auto;\" >. Substitute that<BR>\n" );
document.write( "  into another equation:<BR>\n" );
document.write( "  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2A%283%2F-1+-+1%2Ay%2F-1%29+%2B+1%5Cy+=+5 ALIGN=MIDDLE  ALT=\"1%2A%283%2F-1+-+1%2Ay%2F-1%29+%2B+1%5Cy+=+5\"   DISABLED_style= \"max-width:90%; height:auto;\" > and simplify: So, we know that y=4. Since <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+3%2F-1+-+1%2Ay%2F-1 ALIGN=MIDDLE  ALT=\"x+=+3%2F-1+-+1%2Ay%2F-1\"   DISABLED_style= \"max-width:90%; height:auto;\" >, x=1.<BR>\n" );
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document.write( "  Answer: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=system%28+x=1%2C+y=4+%29 ALIGN=MIDDLE  ALT=\"system%28+x=1%2C+y=4+%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.<BR>\n" );
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document.write( "The solutions are x=1 and y=4 or the point(1,4)\r<BR>\n" );
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document.write( "I hope the above steps were helpful. \r<BR>\n" );
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document.write( "For free Step-By-Step Videos on Introduction to Algebra, please visit http://www.FreedomUniversity.TV/courses/IntroAlgebra or for Trigonometry visit http://www.FreedomUniversity.TV/courses/Trigonometry.\r<BR>\n" );
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document.write( "And good luck in your studies!\r<BR>\n" );
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document.write( "Respectfully,<BR>\n" );
document.write( "Dr J </SPAN>\n" );
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