document.write( "Question 1152619: -4x+4z=24
\n" ); document.write( "6x+2y=-4
\n" ); document.write( "3y+4z=28
\n" ); document.write( " \n" ); document.write( "

Algebra.Com's Answer #774676 by Alan3354(69443) $\"\"$ $\"About$

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-4x+4z=24
\n" ); document.write( "6x+2y=-4
\n" ); document.write( "3y+4z=28
\n" ); document.write( "===============
\n" ); document.write( "I would use elimination.
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\r\n" );
document.write( "-4x + 0y + 4z = 24\r\n" );
document.write( " 0x + 3y + 4z = 28\r\n" );
document.write( "---------------------- Subtract\r\n" );
document.write( "-4x - 3y = -4 --- Eqn A\r\n" );
document.write( "Now you have 2 eqns in x & y\r\n" );
document.write( "================\r\n" );
document.write( " 6x + 2y = -4\r\n" );
document.write( "Divide by 2\r\n" );
document.write( " 3x + 1y = -2\r\n" );
document.write( "Multiply by 3\r\n" );
document.write( " 9x + 3y = -6\r\n" );
document.write( "-4x - 3y = -4 --- Eqn A\r\n" );
document.write( "-------------------------------------- Add\r\n" );
document.write( "5x = -10\r\n" );
document.write( "x = -2\r\n" );
document.write( "===============\r\n" );
document.write( "

\n" ); document.write( "Sub for x in Eqn A to find y
\n" ); document.write( "-4x+4z=24
\n" ); document.write( "Sub for x to find z\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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