Уравнения с дробями, помогите -3/4x=-6/7; X/5=4 -2целые 1/3х=7 1целая2/3х=2целые 1/3...

Решите задачу:

$1) - \frac{3}{4} x = - \frac{6}{7} \\ x = - \frac{6}{7} \times ( - \frac{4}{3} ) = \frac{24}{21 } = \frac{8}{7 } \\ 2) \frac{x}{5} = 4 \\ x = 20$
$3) - 2 \frac{1}{ 3 } x = 7 \\ - \frac{7}{3} x = 7 \\ x = - 3$
$4)1 \frac{2}{3} x = 2 \frac{1}{3} \\ \frac{5}{3} x = \frac{7}{3} \\ x = \frac{7}{ 3} \times \frac{3}{5} = \frac{21}{15} = \frac{7}{5}$
$5)3.5x = 2 \frac{1}{3 } \\ \frac{35}{10} x = \frac{7}{3} \\ \frac{7}{2} x = \frac{7}{3} \\ x = \frac{7}{3} \times \frac{2}{7} = \frac{14}{21} = \frac{2}{3}$