Tìm x, biết: d) − 3/5 . ( 4 x − 1 , 2 ) = − 12/25

d) $\frac{-3}{5}.(4x-1,2)=-\frac{12}{25}$

$\frac{-3}{5}.(4x-\frac{6}{5})=-\frac{12}{25}$

$4x-\frac{6}{5}=-\frac{12}{25}:\left(\frac{-3}{5}\right)$

$4x-\frac{6}{5}=\frac{12}{25}.\frac{5}{3}$

$4x-\frac{6}{5}=\frac{4}{5}$

$4x=\frac{4}{5}+\frac{6}{5}$

$x=\frac{1}{2}$