document.write( "Question 856805: describe and correct the error in solving the linear system. 9x + 8y = 11 and 7x + 6y = 9 \n" ); document.write( "

Algebra.Com's Answer #516147 by stanbon(75887) $\"\"$ $\"About$

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9x + 8y = 11
\n" ); document.write( "7x + 6y = 9
\n" ); document.write( "-----
\n" ); document.write( "Modify for elimination:
\n" ); document.write( "63x + 56y = 77
\n" ); document.write( "63x + 53y = 81
\n" ); document.write( "==========
\n" ); document.write( "Subtract and solve for \"y\":
\n" ); document.write( "3y = -4
\n" ); document.write( "y = -4/3
\n" ); document.write( "------------------
\n" ); document.write( "Solve for \"x\":
\n" ); document.write( "7x + 6y = 9
\n" ); document.write( "7x + 6(-4/3) = (27/3)
\n" ); document.write( "-----
\n" ); document.write( "7x = 51/3
\n" ); document.write( "x = 51/21
\n" ); document.write( "--------------------
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
\n" ); document.write( "==================== \n" ); document.write( "

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