a, x:$\frac{6}{13}$ =$\frac{13}{7}$
x = $\frac{13}{7}$ . $\frac{6}{13}$
x =$\frac{6}{7}$
b,$\frac{4}{7}$ .x -$\frac{2}{3}$= $\frac{1}{5}$
$\frac{4}{7}$ .x =$\frac{1}{5}$ +$\frac{2}{3}$
$\frac{4}{7}$ .x=$\frac{3}{15}$ +$\frac{10}{15}$
$\frac{4}{7}$ .x=$\frac{13}{15}$
x=$\frac{13}{15}$ :$\frac{4}{7}$
x=$\frac{13}{15}$ .$\frac{7}{4}$
x=$\frac{91}{60}$
c,($\frac{3}{10}$-x): $\frac{2}{5}$ =$\frac{3}{5}$
$\frac{3}{10}$-x = $\frac{3}{5}$.$\frac{2}{5}$
$\frac{3}{10}$-x =$\frac{6}{25}$
x =$\frac{3}{10}$- $\frac{6}{25}$
x =$\frac{15}{50}$ - $\frac{12}{50}$
x=$\frac{3}{50}$
d,$\frac{2}{3}$ . x-$\frac{7}{6}$ = $\frac{5}{2}$
$\frac{2}{3}$ . x =$\frac{5}{2}$ +$\frac{7}{6}$
$\frac{2}{3}$ . x =$\frac{15}{6}$ +$\frac{7}{6}$
$\frac{2}{3}$ . x =$\frac{22}{6}$
x =$\frac{22}{6}$ :$\frac{2}{3}$
x =$\frac{22}{6}$ .$\frac{3}{2}$
x =$\frac{11}{2}$
