7/1/3 x (1/6-1/2) < x< 3/4 x( 1/6-1/5-1/15) Giúp vs ạ ( mai mik ktra rồi )

Đáp án:

 $\dfrac{-22}{9}<x<\dfrac{-3}{40}$

Giải thích các bước giải:

 $7\dfrac{1}{3}.\left ( \dfrac{1}{6}-\dfrac{1}{2} \right )<x<\dfrac{3}{4}.\left ( \dfrac{1}{6}-\dfrac{1}{5}-\dfrac{1}{15} \right )\\
\Leftrightarrow \dfrac{22}{3}.\left ( \dfrac{1}{6}-\dfrac{3}{6} \right )<x<\dfrac{3}{4}.\left ( \dfrac{5}{30}-\dfrac{6}{30}-\dfrac{2}{30} \right )\\
\Leftrightarrow  \dfrac{22}{3}.\dfrac{-2}{6} <x<\dfrac{3}{4}.\dfrac{-3}{30}\\
\Leftrightarrow \dfrac{22}{3}.\dfrac{-1}{3} <x<\dfrac{3}{4}.\dfrac{-1}{10}\\
\Leftrightarrow \dfrac{-22}{9}<x<\dfrac{-3}{40}$