Question

what value of k, the pair of linear equation 7x - 3Y = 4, 14x + Ky + 5 equal to zero has a unique solution.​

Answer 1

Answer:

For a pair of equation to have a unique solution, it should satisfy the condition of a1/a2≠b1/b2 so,

7/14≠-3/k

K≠-7/14×3

K≠-7/42

K≠1/6

So if k≠6, the given pair of equation have a unique solution