Question

what is the value of k such that the following pair of linear equation has a unique solution 2x-5y=13 and kx+4y=19​

Answer 1

For unique solution

a¹/b¹≠ a²/b²

So

2/-5 ≠ k/4

-5k ≠ 8

k ≠ -8/5

So k can be any real number except

-8/5

Hope this helps you dear