Đáp án:
a. $\dfrac{7}{6}$ .x = $\dfrac{18}{23}$ : $\dfrac{46}{9}$
=> $\dfrac{7}{6}$x = $\dfrac{81}{529}$
=> x = $\dfrac{81}{529}$ : $\dfrac{7}{6}$
=> x= $\dfrac{486}{3703}$
Vậy x={$\dfrac{486}{3703}$
b. x : $\dfrac{5}{6}$ = $\dfrac{2}{3}$ : $\dfrac{9}{8}$
=> x : $\dfrac{5}{6}$ = $\dfrac{16}{17}$
=>x = $\dfrac{16}{17}$ . $\dfrac{5}{6}$
=> x = $\dfrac{40}{81}$
Vậy x={ $\dfrac{40}{81}$ }
Giải thích các bước giải:
