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    Question

    Simplify: 2(x+1) × 8(x−2) = 64.

    Find x.
    A 17/5 Correct Answer Incorrect Answer
    B 12/5 Correct Answer Incorrect Answer
    C 11/4 Correct Answer Incorrect Answer
    D 23/10 Correct Answer Incorrect Answer

    Solution

    Write all as powers of 2. 8 = 2³, 64 = 2⁶ So: 2^(x+1) × (2³)^(x−2) = 2⁶ 2^(x+1) × 2^(3x−6) = 2⁶ 2^(4x − 5) = 2⁶ So 4x − 5 = 6 4x = 11 x = 11/4

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