SOLUTION: In which line is the first mistake made when solving this equation? 2x + y -� 2z = 23 3x + 2y + z = 11 x -� y + z = �-2 Line 1: z = 11 + 3x + 2y Line 2: 2x + y �- 2(1

Question 1025138: In which line is the first mistake made when solving this equation?
2x + y -� 2z = 23
3x + 2y + z = 11
x -� y + z = �-2
Line 1: z = 11 + 3x + 2y
Line 2: 2x + y �- 2(11 + 3x + 2y) = 23
Line 3: �-4x �- 3y = 45
Line 4: x -� y + (11 + 3x + 2y) = �- 2
Line 5: 4x + y = - �13
Line 6: �-2y = 32
Line 7: y = �16, x = �, z = �-11/4
Answer by ikleyn(52754) (Show Source): You can put this solution on YOUR website!
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In the first line.

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