document.write( "Question 193815This question is from textbook Basic Technical Mathematics
\n" ); document.write( ": Dear Tutor,
\n" ); document.write( "I am getting so many different answers with this...Please help!\r
\n" ); document.write( "\n" ); document.write( "Direction is solve the system of equations
\n" ); document.write( "Solve for x only
\n" ); document.write( "4x + 2y + z = 24
\n" ); document.write( "2x - 3y - z = 2
\n" ); document.write( "5x + y + 2z = 21 \n" ); document.write( "

Algebra.Com's Answer #145512 by stanbon(75887) $\"\"$ $\"About$

You can put this solution on YOUR website!
Solve for x only
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\n" ); document.write( "4x + 2y + z = 24
\n" ); document.write( "2x - 3y - z = 2
\n" ); document.write( "5x + y + 2z = 21
\n" ); document.write( "------------------------
\n" ); document.write( "Add the 1st Eq. to the 2nd ; Subtract 2 times the 1st from the 3rd to get:
\n" ); document.write( "4x + 2y + z = 24
\n" ); document.write( "6x - y + 0 = 26
\n" ); document.write( "-3x - 3y - 0 = -27
\n" ); document.write( "------------------------
\n" ); document.write( "Subtract 3 times the 2nd Eq. from the 3rd to get:
\n" ); document.write( "4x + 2y + z = 24
\n" ); document.write( "6x - y + 0 = 26
\n" ); document.write( "-21x + 0 - 0 = -105
\n" ); document.write( "---------------------------
\n" ); document.write( "Solve the 3rd equation:
\n" ); document.write( "x = 5
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.\r
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