Tìm x vote 5 sao nhé

0 thoughts on “Tìm x vote 5 sao nhé”

1. 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`

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2. ` 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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