1 . If x : y = 5 : 3, then (8x – 5y) : (8x + 5y) =?
Answer: Option D
Explanation:
Hints: x/y = 5/3
8x/5y = 8 × 5/5 × 3
8x - 5y /8x + 5y = 40 - 15 / 40 + 15 = 25/58 = 5/11 = 5 : 11
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