a) (-5).x-2.x-13=29

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a) (-5).x-2.x-13=29

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    Đáp án:

    Giải thích các bước giải:

    (-5)×x-2×x-13=29

    x×(-5-2)=29+13

    x×-7=42

    x=42÷(-7)

    x=-6

    Vậy x=-6

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