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Question

The value of x in mx + ny = c; nx - ny = c + 1 is


  1. x = (m + n) / (c + 1)

  2. x = (2c + 1) / (m + n)

  3. x = m + n

  4. x = 2c + 1


Solution

The correct option is B

x = (2c + 1) / (m + n)


mx + ny = c.............(1)

nx - ny = c + 1.........(2)         add the eqs (1) & (2).

(m + n) x = 2c + 1

x = (2c + 1) / (m + n)

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