document.write( "Question 141192: I am having difficulty with augmented matrices. I need and would appreciate any help with this problem: Using the augmented matrices to solve the following 2X2 systems of equations. Final answer must be given in matrix form.
\n" ); document.write( "Problem to solve: -5x + 7y =9
\n" ); document.write( " x + 10y = 21 \n" ); document.write( "
Algebra.Com's Answer #102827 by stanbon(75887)\"\" \"About 
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Using the augmented matrices to solve the following 2X2 systems of equations. Final answer must be given in matrix form.
\n" ); document.write( "Problem to solve: -5x + 7y =9
\n" ); document.write( "x + 10y = 21
\n" ); document.write( "-----------------------
\n" ); document.write( "1...10...21
\n" ); document.write( "-5...7....9
\n" ); document.write( "------------------
\n" ); document.write( "Multiply 1st row by 5 and add to 2nd row to get:
\n" ); document.write( "-------
\n" ); document.write( "1...10...21
\n" ); document.write( "0...57..114
\n" ); document.write( "------------
\n" ); document.write( "Divide thru 2nd by 57 to get
\n" ); document.write( "1...10...21
\n" ); document.write( "0....1....2
\n" ); document.write( "---------------
\n" ); document.write( "Multiply 2nd row by 10 and subtract from 1st row to get:
\n" ); document.write( "1....0....1
\n" ); document.write( "0....1....2
\n" ); document.write( "===============
\n" ); document.write( "Solution:
\n" ); document.write( "x = 1 ; y = 2
\n" ); document.write( "====================
\n" ); document.write( "Cheers
\n" ); document.write( "Stan H.\r
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