1.

If (x + y) : (x – y) = 5 : 2, find value of (4x + 5y)/(x – 4y)1). 43/52). -5/433). -43/54). 5/43

Answer»

⇒ (X + y)/(x – y) = 5/2,

⇒ 2(x + y) = 5(x – y)

⇒ 2x + 2y = 5x – 5y

3X = 7y

⇒ x = (7/3)y

⇒ (4X + 5y)/(x – 4y) = (4(7/3)y + 5y)/( (7/3)y – 4y) = (28/3 + 5)/(7/3 – 4) = 43/(-5) = -43/5


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