document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=28584>Question 28584</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I'm trying to solve for addition for the following problem\r<BR>\n" );
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document.write( "2x-4y=7<BR>\n" );
document.write( "4x+2y=9\r<BR>\n" );
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document.write( "I began to solve multiplying by 2 for the 2nd equation to get rid of the variable y\r<BR>\n" );
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document.write( "2x-4y=7<BR>\n" );
document.write( "8x+4y=18<BR>\n" );
document.write( "10x=25<BR>\n" );
document.write( "25/10 = 2.5 or x = 2.5\r<BR>\n" );
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document.write( "However, something is wrong, I can't seem to solve for y which makes me think I started out solving this problem of addition the wrong way.\r<BR>\n" );
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document.write( "2(2.5)-4y=7<BR>\n" );
document.write( "-4y=7<BR>\n" );
document.write( "y=3\r<BR>\n" );
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document.write( "2(2.5)-4(3)=<BR>\n" );
document.write( "5-12=-7\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #15834 by </B><A HREF=/tutors/aboutme.mpl?userid=sdmmadam@yahoo.com><B>sdmmadam@yahoo.com(530)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=sdmmadam@yahoo.com><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=15834\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I'm trying to solve for addition for the following problem <BR>\n" );
document.write( "2x-4y=7<BR>\n" );
document.write( "4x+2y=9 <BR>\n" );
document.write( "I began to solve multiplying by 2 for the 2nd equation to get rid of the variable y <BR>\n" );
document.write( "2x-4y=7<BR>\n" );
document.write( "8x+4y=18<BR>\n" );
document.write( "10x=25<BR>\n" );
document.write( "25/10 = 2.5 or x = 2.5 <BR>\n" );
document.write( "However, something is wrong, I can't seem to solve for y which makes me think I started out solving this problem of addition the wrong way. <BR>\n" );
document.write( "2(2.5)-4y=7<BR>\n" );
document.write( "-4y=7<BR>\n" );
document.write( "y=3 <BR>\n" );
document.write( "2(2.5)-4(3)=<BR>\n" );
document.write( "5-12=-7 \r<BR>\n" );
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document.write( "You may edit the question. Maybe convert formulae to the same formula notation <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2-1 ALIGN=MIDDLE  ALT=\"x%5E2-1\"   DISABLED_style= \"max-width:90%; height:auto;\" > as in your solutions.<BR>\n" );
document.write( "I'm trying to solve for addition for the following problem\r<BR>\n" );
document.write( "\n" );
document.write( "2x-4y=7<BR>\n" );
document.write( "4x+2y=9\r<BR>\n" );
document.write( "\n" );
document.write( "I began to solve multiplying by 2 for the 2nd equation to get rid of the variable y\r<BR>\n" );
document.write( "\n" );
document.write( "2x-4y=7<BR>\n" );
document.write( "8x+4y=18<BR>\n" );
document.write( "10x=25<BR>\n" );
document.write( "25/10 = 2.5 or x = 2.5\r<BR>\n" );
document.write( "\n" );
document.write( "However, something is wrong, I can't seem to solve for y which makes me think I started out solving this problem of addition the wrong way.\r<BR>\n" );
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document.write( "2(2.5)-4y=7<BR>\n" );
document.write( "TILL HERE YOU ARE RIGHT!<BR>\n" );
document.write( "YOU ARE ALMOST THERE.DON'T WORRY!<BR>\n" );
document.write( "(Are you hungry? you have swallowed 2X(2.5). That is the culprit)<BR>\n" );
document.write( "Let me delete the wrong portions and continue<BR>\n" );
document.write( "5-4y =7<BR>\n" );
document.write( "5-7 = 4y<BR>\n" );
document.write( "-2=4y<BR>\n" );
document.write( "y= -2/4 = -1/2<BR>\n" );
document.write( "Therefore  x=5/2 and y= (-1/2)<BR>\n" );
document.write( "Verification: consider 4x+2y =9 the other equation.<BR>\n" );
document.write( "Putting x=5/2 and y= (-1/2),we have <BR>\n" );
document.write( "LHS= 4x+2y =4X(5/2)+2X(-1/2) = 10-1=9 which is the right LHS.<BR>\n" );
document.write( "Therefore our values are correct<BR>\n" );
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document.write( "</TD></TR></TABLE>\n" );