document.write( "Question 298233: I am not good at these types of problems and I dont have a calculator to calculate these types of problems any help would be great. I am not even sure if I put these under the correct type of problem\r
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\n" ); document.write( "\n" ); document.write( "Solve any way you can\r
\n" ); document.write( "\n" ); document.write( "3x - y - 2z = 11
\n" ); document.write( "x – 2y + 3z = 12
\n" ); document.write( "x + y - 2z = 5\r
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\n" ); document.write( "\n" ); document.write( "John \n" ); document.write( "
Algebra.Com's Answer #214608 by amoati(11)\"\" \"About 
You can put this solution on YOUR website!
3x - y - 2z = 11 -- (1)
\n" ); document.write( "x – 2y + 3z = 12 -- (2)
\n" ); document.write( "x + y - 2z = 5 -- (3)\r
\n" ); document.write( "\n" ); document.write( "multiplying (3) by 2 yields 2x + 2y - 4z = 10 then adding this to 2 yields:\r
\n" ); document.write( "\n" ); document.write( "3x - z = 22 -- (4)\r
\n" ); document.write( "\n" ); document.write( "Then multiplying (1) by 2 yields 6x -2y - 4z = 22 then subtracting it from (2) yields:\r
\n" ); document.write( "\n" ); document.write( "5x - 7z = 10 -- (5)\r
\n" ); document.write( "\n" ); document.write( "multiplying (4) by 7 yields 21x -7z = 154 and then subtracting it from (5) yields:\r
\n" ); document.write( "\n" ); document.write( "16x = 144 --> x = 9 using this in (4), z = 5, using these values in (3), y = 6\r
\n" ); document.write( "\n" ); document.write( "So x = 9, y = 6, z = 5\r
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