Tìm x biết -4/3x=2/3: 7/12: 4/18

7/10

Tìm x biết $\frac{{ - 4}}{3}{\rm{x}} = \frac{2}{3}:\frac{7}{{12}}:\frac{4}{{18}}$

$\frac{1}{7}$

$\frac{- 1}{7}$

$\frac{- 27}{7}$

$\frac{27}{7}$

Giải thích

Đáp án đúng là: C

$\frac{{ - 4}}{3}{\rm{x}} = \frac{2}{3}:\frac{7}{{12}}:\frac{4}{{18}}$

$\frac{{ - 4}}{3}{\rm{x}} = \frac{2}{3} \cdot \frac{{12}}{7} \cdot \frac{{18}}{4}$

$\frac{{ - 4}}{3}{\rm{x}} = \frac{{36}}{7}$

${\rm{x}} = \frac{{36}}{7}:\frac{{ - 4}}{3}$

${\rm{x}} = \frac{{36}}{7} \cdot \frac{3}{{ - 4}}$

${\rm{x}} = \frac{{ - 27}}{7}$.