а)

${\displaystyle \frac{2}{x}}=4$

б)

$25={\displaystyle \frac{5}{x}}$

в)

$14={\displaystyle \frac{2}{x}}-2$

г)

$7-{\displaystyle \frac{3}{x}}=9$

д)

${\displaystyle \frac{10}{3x}}-3=7$

е)

${\displaystyle \frac{3}{2x}}=3$

а)

${\displaystyle \frac{20}{5x}}=2$

б)

$4={\displaystyle \frac{2}{x}}$

в)

$0=5+{\displaystyle \frac{15}{-x}}$

г)

$9={\displaystyle \frac{3}{2x}}$

д)

${\displaystyle \frac{3}{x}}=21$

е)

$100={\displaystyle \frac{20}{x}}$