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1. In the equation: 31(m - n) - 32(m - n) + (m - n) =?

  • A. -n
  • B. -n
  • C. -n
  • D. -n

Answer: Option C

Explanation:

31(m-n) - 32(m-n) + (m-n)

= 31m - 31n - 32m + 32n + m - n

= 0

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