Q7 of 50 Page 4

If x = 1 and y = -1 is a solution of the equation 12x – ky = (2k + 1).

Find the value of k.

Putting the values of x and y inn the equation, we get,


12 × 1 – k × (-1) = (2k + 1)


12 + k = 2k + 1


2k – k = 12 – 1


k = 11


Hence, the value of k is 11.


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