document.write( "Question 892453: solve the system of 2 equations and 2 unknown using the echelon method.
\n" ); document.write( "3x/8-3y/5=33/80
\n" ); document.write( "4x+4y=23/35 \n" ); document.write( "
Algebra.Com's Answer #540490 by richwmiller(17219)\"\" \"About 
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3/8,-3/5,33/80
\n" ); document.write( "4,4,23/35\r
\n" ); document.write( "\n" ); document.write( "divide row 1 by 3/8
\n" ); document.write( "1,-24/15,264/240
\n" ); document.write( "4,4,23/35\r
\n" ); document.write( "\n" ); document.write( "add down (-4/1) *row 1 to row 2
\n" ); document.write( "1,-8/5,11/10
\n" ); document.write( "0,52/5,-1310/350\r
\n" ); document.write( "\n" ); document.write( "divide row 2 by 52/5
\n" ); document.write( "1,-8/5,11/10
\n" ); document.write( "0,1,-655/1820\r
\n" ); document.write( "\n" ); document.write( "We now have the value for the last variable.
\n" ); document.write( "We will work our way up and get the other solutions.\r
\n" ); document.write( "\n" ); document.write( "add up (8/5) *row 2 to row 1
\n" ); document.write( "1,0,9540/18200
\n" ); document.write( "0,1,-131/364\r
\n" ); document.write( "\n" ); document.write( "final
\n" ); document.write( "1,0,477/910
\n" ); document.write( "0,1,-131/364\r
\n" ); document.write( "\n" ); document.write( "1,0,477/910 = 0.52417582
\n" ); document.write( "0,1,-131/364 = -0.35989011
\n" ); document.write( "\"477/910\",\"-131/364\"
\n" ); document.write( "(477/910,-131/364)
\n" ); document.write( " \n" ); document.write( "
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