Tìm x, biết: c) ( 0 , 25 − x ) : − 3/5 = − 3/4

c) $(0,25-x):\frac{-3}{5}=-\frac{3}{4}$

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

$\frac{1}{4}-x=-\frac{3}{4}.\left(\frac{-3}{5}\right)$

$\frac{1}{4}-x=\frac{9}{20}$

$x=\frac{-1}{5}$