$c)$
$\frac{4}{7}x-$ $\frac{2}{3}=$ $\frac{4}{5}$
$\frac{4}{7}x$$=\frac{4}{5}+$ $\frac{2}{3}$
$\frac{4}{7}x$$=\frac{22}{15}$
$x=\frac{22}{15}:$ $\frac{4}{7}$
$x=\frac{22}{15}.$ $\frac{7}{4}$
$x=\frac{22.7}{15.4}=$ $\frac{77}{30}$
$d)$
$2x+30$%= $-1,5$
$2x+\frac{3}{10}=-1,5$
$2x =-1,5-$$\frac{3}{10}$
$2x=$$-\frac{9}{5}$
$x=-\frac{9}{5}:2$
$x=-\frac{9}{5}.$ $\frac{1}{2}$
$x=-\frac{9}{10}$
