यदि 3x+y = 81 और 81x-y = 3, तो x × y = ?
 

  • 1

    𝟐𝟓𝟓/𝟔𝟒

  • 2

    𝟏𝟐𝟓/𝟏𝟐

  • 3

    𝟐𝟒𝟎/𝟔𝟒

  • 4

    None

Answer:- 1

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