document.write( "Question 1193249: 1.Solve the system of equations.
\n" ); document.write( "x-2y+3z=7
\n" ); document.write( "2x+y+z=4
\n" ); document.write( "-3x+2y-2z=-10 \n" ); document.write( "

Algebra.Com's Answer #825370 by MathTherapy(10552) $\"\"$ $\"About$

You can put this solution on YOUR website!

\n" ); document.write( "1.Solve the system of equations.
\n" ); document.write( "x-2y+3z=7
\n" ); document.write( "2x+y+z=4
\n" ); document.write( "-3x+2y-2z=-10
\n" ); document.write( "

There she goes again!!\r\n" );
document.write( "For your sanity you need to IGNORE that woman's attempt to solve this system.\r\n" );
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document.write( "   4x + 2y + 2z = 8 ------ Multiplying eq (ii) by 2 ------ eq (iv)\r\n" );
document.write( "        5x + 5z = 15 ----- Adding eqs (iv) & (i) \r\n" );
document.write( "       5(x + z) = 5(3)_____x + z = 3 ------ eq (v)\r\n" );
document.write( "       - 2x + z = - 3 -----Adding eqs (i) & (iii) ------ eq (vi)\r\n" );
document.write( "             3x = 6 ------ Subtracting eq (vi) from eq (v)\r\n" );
document.write( "             \r\n" );
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document.write( "          2 + z = 3 ------- Substituting 2 for x in eq (v)\r\n" );
document.write( "             z = 3 - 2 = 1\r\n" );
document.write( "   \r\n" );
document.write( "   2(2) + y + 1 = 4 ------- Substituting 2 for x and 1 for z in eq (ii)\r\n" );
document.write( "      4 + y + 1 = 4\r\n" );
document.write( "          y + 5 = 4\r\n" );
document.write( "             y = 4 - 5 = - 1\r\n" );
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document.write( "   You can do the CHECKS!!\r\n" );
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