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Find the value of k so that kx + 3y = 7 and 4x + 6y = 14 represent coincident lines.
Ak = 2
Bk = 1
Ck = 6
Dk = 4
Answer & Solution
Correct answer: A. k = 2
Coincident ⇒ a₁/a₂ = b₁/b₂ = c₁/c₂. From b: 3/6 = 1/2. From c: 7/14 = 1/2. So a: k/4 = 1/2 ⇒ k = 2.
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