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If kx + 2y = 5 and 3x + y = 1 has a unique solution, if (A) k = 6

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If kx + 2y = 5 and 3x + y = 1 has a unique solution, if

(A) k = 6

(B) k ≠ 6

(C) k = 0

(D) k has any value

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Answer is (B) k ≠ 6

Condition for unique solution is

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