1 $\frac{1}{2}$ – ( $\frac{2}{5}$ . x – $\frac{1}{3}$ ) = $\frac{2}{3}$

0 bình luận về “1 $\frac{1}{2}$ – ( $\frac{2}{5}$ . x – $\frac{1}{3}$ ) = $\frac{2}{3}$”

1. `1 1/2 – ( 2/5 x – 1/3) =2/3`

   `=> 3/2 – (2/5 x – 1/3) =2/3`

   `=> 2/5 x – 1/3 = 3/2 – 2/3`

   `=> 2/5 x- 1/3= 5/6`

   `=> 2/5 x = 5/6 + 1/3`

   `=> 2/5 x= 7/6`

   `=> x= 7/6 : 2/5`

   `=> x= 7/6 . 5/2`

   `=> x= 35/12`

   Vậy `x= 35/12`

    

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2. `1{1}/2-(2/5.x-1/3)=2/3`

   `->` `3/2-(2/5.x-1/3)=2/3`

   `->` `2/5.x-1/3=3/2-2/3`

   `->` `2/5.x-1/3=5/6`

   `->` `2/5.x=5/6+1/3`

   `->` `2/5.x=7/6`

   `->` `x=7/6:2/5`

   `->` `x=7/6.{5}/2`

   `->` `x=35/12`

   `text(Vậy:)` `x=35/12`

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