document.write( "Question 485805: Please help... GRE cramming and struggling.\r
\n" ); document.write( "\n" ); document.write( "7x+3y=12
\n" ); document.write( "3x+7y=6\r
\n" ); document.write( "\n" ); document.write( "x-y=?\r
\n" ); document.write( "\n" ); document.write( "Have tried several methods, keep getting crazy fractions.\r
\n" ); document.write( "\n" ); document.write( "Thanks so much.\r
\n" ); document.write( "\n" ); document.write( "E \n" ); document.write( "
Algebra.Com's Answer #332183 by mananth(16949)\"\" \"About 
You can put this solution on YOUR website!
7 x + 3 y = 12 .............1
\n" ); document.write( "3 x + 7 y = 6 .............2
\n" ); document.write( "Eliminate y
\n" ); document.write( "multiply (1)by 7
\n" ); document.write( "Multiply (2) by -3
\n" ); document.write( "49 x 21 y = 84
\n" ); document.write( "-9 x -21 y = -18
\n" ); document.write( "Add the two equations
\n" ); document.write( "40 x = 66
\n" ); document.write( "/ 40
\n" ); document.write( "x = 1.65
\n" ); document.write( "plug value of x in (1)
\n" ); document.write( "7 x + 3 y = 12
\n" ); document.write( "11.55 + 3 y = 12
\n" ); document.write( " 3 y = 12 -11.55
\n" ); document.write( " 3 y = 0.45
\n" ); document.write( " y = 0.15 \r
\n" ); document.write( "\n" ); document.write( "x-y = 1.5\r
\n" ); document.write( "\n" ); document.write( "m.ananth@hotmail.ca
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