Question

if the pair of linear equations x - y = 1 and X + k y = 5 has unique solution X = 2 and y = 1 then the value of k is

Answer 1

Step-by-step explanation:

It has unique solution means a¹/a² not equal to b¹/b²

1/k not equal to -1 /1

-k not equal to 1

k not equal to -1

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Answer 2

Step-by-step explanation:

k ≠3 easy pisy

ok

use comparing method to solve