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    Question

    (64/25)? × (125/512)?-1 = 

    5/8
    A 3 Correct Answer Incorrect Answer
    B 8 Correct Answer Incorrect Answer
    C 4 Correct Answer Incorrect Answer
    D 12 Correct Answer Incorrect Answer

    Solution

    Let ? = x => (8/5)2x  × (5/8)(3x-3) =  5/8  ⇒ (5/8)-2x  × (5/8)(3x-3) =  5/8  ⇒ (5/8)(-2x+3x-3) =  5/8 ⇒ (5/8)(x-3) =  5/8 ⇒ x - 3 = 1 ⇒ x = 4 

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