1 - (5$\frac{4}{9}$ + x - 7$\frac{7}{18}$) : 15$\frac{3}{4}$ = 0
(5$\frac{4}{9}$ + x - 7$\frac{7}{18}$) : 15$\frac{3}{4}$ = 1 - 0
(5$\frac{4}{9}$ + x - 7$\frac{7}{18}$) : 15$\frac{3}{4}$ = 1
5$\frac{4}{9}$ + x - 7$\frac{7}{18}$ = 1 . 15$\frac{3}{4}$
5$\frac{4}{9}$ + x - 7$\frac{7}{18}$ = 15$\frac{3}{4}$
5$\frac{4}{9}$ + x = 15$\frac{3}{4}$ + 7$\frac{7}{18}$
5$\frac{4}{9}$ + x = 23$\frac{5}{36}$
x = 23$\frac{5}{36}$ - 5$\frac{4}{9}$
x = 17$\frac{25}{36}$
Chúc học tốt!!!