a) $\frac{5}{9}$ . x - $\frac{7}{8}$ = $\frac{-1}{4}$
$\frac{5}{9}$ . x = $\frac{-1}{4}$ + $\frac{7}{8}$
$\frac{5}{9}$ . x = $\frac{5}{8}$
x = $\frac{5}{8}$ : $\frac{5}{9}$
x = $\frac{9}{8}$.
b) $\frac{7}{9}$ - $\frac{1}{3}$ . x = $\frac{-1}{2}$ + $\frac{1}{6}$
$\frac{7}{9}$ - $\frac{1}{3}$ . x = $\frac{-1}{3}$
$\frac{1}{3}$ . x = $\frac{7}{9}$ - $\frac{-1}{3}$
$\frac{1}{3}$ . x = $\frac{10}{9}$
x = $\frac{10}{9}$ : $\frac{1}{3}$
x = $\frac{10}{3}$.
CHO MÌNH CTLHN NHÉ.
