math-algebra

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15. Solve the following system of equations.

x + y – z = -1
x + y + z = 3
3x – 2y – z = -4:

A. (-1, 3, 3)

B. (0, 1, 2)

C. (1, 0, 2)

D. (3, -1, 2)

  • math-algebra -

    Since this is multiple choice, why not just try which of the three sets of numbers satisfy all equations? Obviously, answer A does not satisfy x+y+z=3

    Alternatively, use standard methods of algebra two reduce the number of vaiables to one, or use determinants.

    I will be happy to critique your work.

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