True/False

You are a production manager auditing the cost variances of three materials—xx, yy, and zz—used in your factory. The variances are modeled by the following system of linear equations:

  1. 3x−4z=0{}3x - 4z = 0
  2. 3y+2z=−3{}3y + 2z = -3
  3. 2x+3y=−5{}2x + 3y = -5

True or False: In the standard elimination procedure for this system, multiplying Equation 2 by 2 and adding it to Equation 1 successfully eliminates the variable zz and generates the two-variable equation 3x+6y=−6{}3x + 6y = -6.

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Updated 2026-09-18

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