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    Question

    Simplify the expression: 3x + 5y - [(7x + 3y) -

    (2x + y) + 4y] - x
    A -3x - y Correct Answer Incorrect Answer
    B 6y - 3x Correct Answer Incorrect Answer
    C 6y - 5x Correct Answer Incorrect Answer
    D 2y - 5x Correct Answer Incorrect Answer

    Solution

    3x + 5y - [(7x + 3y) - (2x + y) + 4y] - x
    = 3x + 5y - [7x + 3y - 2x - y + 4y] - x
    = 3x + 5y - [5x + 6y] - x
    = 3x + 5y - 5x - 6y - x
    = -3x - y

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