5,2 . x + 7 2/5 = 6 3/4 2,4 : ( -1/2 – x ) = 1 3/5

Question

5,2 . x + 7 2/5 = 6 3/4
2,4 : ( -1/2 – x ) = 1 3/5

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Ariana 4 tháng 2021-08-25T15:21:36+00:00 2 Answers 9 views 0

Answers ( )

    0
    2021-08-25T15:22:48+00:00

    Đáp án:

    a) `x  = -1/8`

    b) `x = -33/16`

    Giải thích các bước giải:

    a) `5,2 x + 7 2/5 = 6 3/4`

    `to 5,2 x = 6 3/4 – 7 2/5`

    `to 5,2 x = -13/20`

    `to x = -13/20 : 5,2`

    `to x = -1/8`

    Vậy `x  = -1/8`

    b) `2,5 : ( -1/2 – x ) = 1 3/5`

    `to -1/2 – x = 2,5 : 1 3/5`

    `to -1/2 – x = 25/16`

    `to x = -1/2 – 25/16`

    `to x = -33/16`

    Vậy `x = -33/16`

    0
    2021-08-25T15:23:01+00:00

    `5,2 . x + 7 2/5 = 6 3/4`

    `26/5. x + 37/5 = 27/4`

    `26/5.  x= 27/4 – 37/5`

    `26/5 x= -13/20`

    `x= -13/20 : 26/5`

    `x= -13/20 . 5/26`

    `x= -1/8`

    Vậy `x= -1/8`

    `2,4 : (-1/2 – x) = 1 3/5`

    `12/5 : ( -1/2 – x )= 8/5`

    `-1/2 – x= 12/5 : 8/5`

    `-1/2 -x = 3/2`

    `x = -1/2 – 3/2`

    `x= -2`

    Vậy `x= -2`

     

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