1/5:x=14/24 x:2/3=15/20

Question

1/5:x=14/24
x:2/3=15/20

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Jezebel 5 years 2021-05-19T12:29:16+00:00 2 Answers 28 views 0

Answers ( )

  1. Delwyn
    0
    2021-05-19T12:30:37+00:00
    Reply

    a )

    `1/5` : x = `14/24`

               x = `1/5` : `14/24`

              x = `12/35`

    b )

    x : `2/3` = `15/20`

               x = `15/20` x `2/3`

               x = `30/60` = `1/2`

    Mik xin hay nhất ạ !

  2. Adela
    0
    2021-05-19T12:30:58+00:00
    Reply

    Giải thích các bước giải:

    `1/5:x=14/24`
    `=>1/5:x=7/12`
    `=>x=1/5:7/12`
    `=>x=1/5 . 12/7`
    `=>x=12/35`
    Vậy `x=12/35`
    `x:2/3=15/20`
    `=>x:2/3=3/4`
    `=>x=3/4 . 2/3`
    `=>x=1/2`
    Vậy `x=1/2`

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