Question:
Find the value of λ, if x = -λ and y = 5/2 is a solution of the equation x + 4y – 7 = 0
Solution:
We are given, x + 4y - 7 = 0 (- λ, - 5) is a solution of equation 3x + 4y = k
Substituting x = - λ and y = 5/2 in x + 4y - 7 = 0,
We get; - λ + 4 × (5/2) - 7 = 0 -λ + 4 × 5/2 - 7 = 0
λ = 10 - 7
λ = 3