document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=515775>Question 515775</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Can you solve these problems by substitution?\r<BR>\n" );
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document.write( "1.)<BR>\n" );
document.write( "x + 2y = -1<BR>\n" );
document.write( "4x - 5y = 22\r<BR>\n" );
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document.write( "2.)<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 #344165 by </B><A HREF=/tutors/aboutme.mpl?userid=Maths68><B>Maths68(1474)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Maths68><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=Maths68><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=344165\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "1.)<BR>\n" );
document.write( "x + 2y = -1............(1)<BR>\n" );
document.write( "4x - 5y = 22...........(2)\r<BR>\n" );
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document.write( "Multiply (1) by -4 and add to (2)\r<BR>\n" );
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document.write( "-4x-8y=4<BR>\n" );
document.write( "4x-5y=22<BR>\n" );
document.write( "-13y=26<BR>\n" );
document.write( "-13y/-13=26/-13<BR>\n" );
document.write( "y=-2<BR>\n" );
document.write( "Put the value of y in (1)<BR>\n" );
document.write( "x+2y=-1<BR>\n" );
document.write( "x+2(-2)=-1<BR>\n" );
document.write( "x-4=-1<BR>\n" );
document.write( "x=-1+4<BR>\n" );
document.write( "x=3\r<BR>\n" );
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document.write( "x,y = 3, -2\r<BR>\n" );
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document.write( "Check <BR>\n" );
document.write( "Put the values of x and y in (1)<BR>\n" );
document.write( "x + 2y = -1............(1)<BR>\n" );
document.write( "3+2(-2)=-1<BR>\n" );
document.write( "3-4=-1<BR>\n" );
document.write( "-1=-1\r<BR>\n" );
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document.write( "2.)<BR>\n" );
document.write( "-3x + 7y = 14 ..........(1)<BR>\n" );
document.write( "2x -  y = -13...........(2)\r<BR>\n" );
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document.write( "Multiply (2) by 7 and add to (2)<BR>\n" );
document.write( "-3x + 7y = 14<BR>\n" );
document.write( "14x - 7y = -91<BR>\n" );
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document.write( "11x=-77<BR>\n" );
document.write( "11x/11=-77/11<BR>\n" );
document.write( "x=-7\r<BR>\n" );
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document.write( "Put the value of x in (2)<BR>\n" );
document.write( "2x -  y = -13...........(2)<BR>\n" );
document.write( "2(-7)-y=-13<BR>\n" );
document.write( "-14-y=-13<BR>\n" );
document.write( "-y=-13+14<BR>\n" );
document.write( "-y=1<BR>\n" );
document.write( "y=-1\r<BR>\n" );
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document.write( "x,y=-7,-1\r<BR>\n" );
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document.write( "Check<BR>\n" );
document.write( "Put the values of x and y in (2)<BR>\n" );
document.write( "2(-7) - (-1) = -13<BR>\n" );
document.write( "-14 + 1 = -13<BR>\n" );
document.write( "-13=-13\r<BR>\n" );
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document.write( " </SPAN>\n" );
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