a)$\frac{2}{3}$.x+$\frac{1}{5}$=$\frac{7}{10}$-x
b)3$\frac{2}{9}$:1$\frac{1}{9}$-$\frac{46}{5}$.$\frac{5}{23}$+$\frac{4}{5}$
c)(3$\frac{4}{5}$-2.x).1$\frac{1}{3}$=5$\frac{5}{7}$
Loga
Sinh Học lớp 12
