document.write( "Question 891054: Solve the system of 2 equations & 2 unknowns using the echelon method.
\n" ); document.write( "3x/8-3y/5=33/80
\n" ); document.write( "4x/7+4y/5=23/35 \n" ); document.write( "
Algebra.Com's Answer #539466 by richwmiller(17219)\"\" \"About 
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3/8,-3/5,33/80
\n" ); document.write( "4/7,4/5,23/35\r
\n" ); document.write( "\n" ); document.write( "divide row 1 by 3/8
\n" ); document.write( "1,-24/15,264/240
\n" ); document.write( "4/7,4/5,23/35\r
\n" ); document.write( "\n" ); document.write( "add down (-4/7) *row 1 to row 2
\n" ); document.write( "1,-8/5,11/10
\n" ); document.write( "0,300/175,70/2450\r
\n" ); document.write( "\n" ); document.write( "divide row 2 by 12/7
\n" ); document.write( "1,-8/5,11/10
\n" ); document.write( "0,1,49/2940\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( "1,0,23660/21000
\n" ); document.write( "0,1,7/420\r
\n" ); document.write( "\n" ); document.write( "final
\n" ); document.write( "1,0,169/150 = 1.12666667
\n" ); document.write( "0,1,7/420 = 0.16666667e-1
\n" ); document.write( "final \r
\n" ); document.write( "\n" ); document.write( "169/150,7/420
\n" ); document.write( " \n" ); document.write( "
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