help help help help help help

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help help help help help help
help-help-help-help-help-help

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Kiệt Gia 2 years 2020-10-30T03:16:28+00:00 2 Answers 73 views 0

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    0
    2020-10-30T03:18:03+00:00

    `307-[(180-160):2+9]:2`

    `=307-[20:2+9]:2`

    `=307-[10+9]:2`

    `=307-\frac{19}{2}`

    `=\frac{614}{2}-\frac{19}{2}`

    `=\frac{595}{2}`

     

    0
    2020-10-30T03:18:16+00:00

    Đáp án:

     297,5

    Giải thích các bước giải:

    help-help-help-help-help-help

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )