If x = 3, y = k is a solution of the equation 3x - 4y + 7 = 0, then the value of k is

1. 16

2. -16

3. 4

4. -4

Substituting x = 3 and y = k in 3x - 4y + 7 = 0 we get,

⇒ 3(3) - 4(k) + 7 = 0

⇒ 9 - 4k + 7 = 0

⇒ 4k = 16

⇒ k = 4.

Hence, Option 3 is the correct option.