(7-6,2.x): 4/15 = 7 – 50%

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(7-6,2.x): 4/15 = 7 – 50%

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Cherry 5 years 2021-05-18T13:27:55+00:00 2 Answers 22 views 0

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  1. ngochoa
    0
    2021-05-18T13:28:57+00:00
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    (7-6,2.x): 4/15 = 7 – 50%

    (7-6,2.x): 4/15 = 7 – 1/2

    (7-6,2.x)÷4/15=13/2

    7-6,2.x           =13/2÷4/15

    7-  6,2.x     =195/8

        6,2.x         =195/8 + 7

    6,2.x             =251/8

    x                  =251/8÷6,2

    x                  =1255/248

  2. phucdien
    0
    2021-05-18T13:29:34+00:00
    Reply

    Đáp án:

    `x=79/93`

    Giải thích các bước giải:

    `(7-6,2.x): 4/15 = 7 – 50%`
    `=>(7-6,2.x):4/15=7-0,5`
    `=>(7-6,2.x):4/15=6,5`
    `=>7-6,2.x=6,5 . 4/15`
    `=>7-6,2.x=26/15`
    `=>6,2.x=7-26/15`
    `=>6,2.x=105/15-26/15`
    `=>6,2.x=79/15`
    `=>x=79/15:6,2`
    `=>x=79/15 . 1/(6,2)`
    `=>x=79/93`
    Vậy `x=79/93`

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