tìm x nha mn: 2/3 x -2/5=1/2 x -1/3 helppppppppppp

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1. Bạn tham khảo nhé.
   $\frac{2}{3}$ . x – $\frac{2}{5}$ = $\frac{1}{2}$ . x – $\frac{1}{3}$
   ⇒ $\frac{2}{3}$ . (x . x) – $\frac{2}{5}$ = $\frac{1}{2}$ – $\frac{1}{3}$
   ⇒ $\frac{2}{3}$ . 2x – $\frac{2}{5}$ = $\frac{1}{2}$ – $\frac{1}{3}$
   ⇒ $\frac{2}{3}$ . 2x – $\frac{2}{5}$ = $\frac{1}{6}$
   ⇒ $\frac{2}{3}$ . 2x = $\frac{1}{6}$ + $\frac{2}{5}$
   ⇒ $\frac{2}{3}$ . 2x = $\frac{17}{30}$
   ⇒ 2x = $\frac{17}{30}$ : $\frac{2}{3}$
   ⇒ 2x = $\frac{17}{30}$ . $\frac{3}{2}$
   ⇒ 2x = $\frac{17}{20}$
   ⇒ x = $\frac{17}{20}$ : 2
   ⇒ x = $\frac{17}{20}$ . $\frac{1}{2}$
   ⇒ x = $\frac{17}{40}$
   Vậy x = $\frac{17}{40}$
   @FbBinhne2k88

    

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2. Đáp án:

   `x=1/7`

   Giải thích các bước giải:

    `2/3x-2/5=1/5x-1/3`

   `⇔2/3x-1/5x=-1/3+2/5`

   `⇔(10)/15x-3/15x=-5/15+6/15`

   `⇔7/15x=1/15`

   `⇔x=1/15:7/15`

   `⇔x=1/15×(15)/7`

   `⇔x=1/7`

   Vậy `x=1/7`

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