Giúppp emm với ạ emm cảm ơn mng:((Spam=bc

c) x. $\frac{4}{25}$ = $\frac{16}{5}$ 

x = $\frac{16}{5}$ : $\frac{4}{25}$

x = $\frac{16}{5}$ . $\frac{25}{4}$

x = 20

f) x - $\frac{1}{7}$ = $\frac{6}{35}$

x = $\frac{6}{35}$ + $\frac{1}{7}$

x = $\frac{6}{35}$ + $\frac{5}{35}$

x = $\frac{11}{35}$

i) (2$\frac{1}{5}$ + $\frac{3}{5}$x) : $\frac{1}{3}$ = $\frac{3}{4}$

($\frac{11}{5}$ + $\frac{3}{5}$x) : $\frac{1}{3}$ = $\frac{3}{4}$

$\frac{11}{5}$ + $\frac{3}{5}$x = $\frac{3}{4}$ . $\frac{1}{3}$

$\frac{11}{5}$ + $\frac{3}{5}$x = $\frac{1}{4}$ 

$\frac{3}{5}$x = $\frac{1}{4}$ - $\frac{11}{5}$

$\frac{3}{5}$x = $\frac{5}{20}$ - $\frac{44}{20}$

$\frac{3}{5}$x = $\frac{-39}{20}$

x = $\frac{-39}{20}$ : $\frac{3}{5}$

x = $\frac{-13}{4}$