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