Tìm x vote 5 sao nhé

Question

Tìm x vote 5 sao nhé
tim-vote-5-sao-nhe

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Adela 4 years 2020-10-14T20:26:40+00:00 2 Answers 95 views 0

Answers ( )

  1. Doris
    0
    2020-10-14T20:27:43+00:00
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    a) `2,5÷7,5=x÷3/5`

    `⇒ 1/3=x÷3/5`

    `⇒ x=1/3 . 3/5`

    `⇒ x=1/5`

    b) `2 2/3 ÷x=1 7/9 ÷0,2`

    `⇒ 8/3 ÷x=16/9 ÷0,2`

    `⇒ 8/3 ÷x=80/9`

    `⇒ x=8/3 ÷80/9`

    `⇒ x=3/10`

  2. Edana
    0
    2020-10-14T20:28:27+00:00
    Reply

    ` a) ` ` 2,5 : 7,5 = x : 3/5 `

    ` <=> x : 3/5 = 1/3 `

    ` <=> x = 1/3 . 3/5 `

    ` <=> x = 1/5 `

    ` b) ` ` 2 2/3 : x = 1 7/9 : 0,2 `

    ` <=> 8/3 : x = 16/9 : 1/5 `

    ` <=> 8/3 : x = 16/9 . 5 `

    ` <=> 8/3 : x = 80/9 `

    ` <=> x = 8/3 . 9/80 `

    ` <=> x = 3/10 `

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