document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1091822>Question 1091822</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve with Substitution, explain how you got your answer with each step.\r<BR>\n" );
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document.write( " 7x + y = 7<BR>\n" );
document.write( "4x + 3y = 21 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #706285 by </B><A HREF=/tutors/aboutme.mpl?userid=rothauserc><B>rothauserc(4718)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rothauserc><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=rothauserc><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=706285\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 1) 7x + y = 7<BR>\n" );
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document.write( "2) 4x + 3y = 21<BR>\n" );
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document.write( "solve equation 1) for y<BR>\n" );
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document.write( "y = 7 - 7x<BR>\n" );
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document.write( "substitute for y in equation 2<BR>\n" );
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document.write( "4x +3(7 - 7x) = 21<BR>\n" );
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document.write( "4x +21 - 21x = 21<BR>\n" );
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document.write( "-17x = 0<BR>\n" );
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document.write( "x = 0<BR>\n" );
document.write( "y = 7 -7(0) = 7<BR>\n" );
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document.write( "x = 0 and y = 7<BR>\n" );
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document.write( " </SPAN>\n" );
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