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    Question

    Simplify: 5x + 7y - [(10x + 4y) - (3x + 2y) + 5y]

    - 3x
    A 5y - 8x Correct Answer Incorrect Answer
    B 6y - 8x Correct Answer Incorrect Answer
    C 6y - 11x Correct Answer Incorrect Answer
    D -5x Correct Answer Incorrect Answer

    Solution

    5x + 7y - [(10x + 4y) - (3x + 2y) + 5y] - 3x
    = 5x + 7y - [10x + 4y - 3x - 2y + 5y] - 3x
    = 5x + 7y - [7x + 7y] - 3x
    = 5x + 7y - 7x - 7y - 3x
    = -5x

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