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Q: If 3x + 4y – 2z + 9 = 17, 7x + 2y + 11z + 8 = 23 and 5x + 9y + 6z – 4 = 18, then what is the value of x + y + z – 34 ?
  • A. –28
  • B. –14
  • C. –31
  • D. –45
Correct Answer: Option C -
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Explanations:

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