[tex] \frac{3}{5} x = 1 \\ x = 1 \div \frac{3}{5} \\ x = \frac{5}{3} \\ x = 1 \frac{2}{3} [/tex]

[tex] \frac{3}{7} x = \frac{1}{2} \\ x = \frac{1}{2} \div \frac{3}{7 } \\ x = \frac{7}{2 \times 3} \\ x = \frac{7}{6} \\ x = 1 \frac{1}{6} [/tex]

[tex] \frac{5}{6} x = \frac{2}{3} \\ x = \frac{2}{3} \div \frac{5}{6} \\ x = \frac{2 \times 6}{3 \times 5} \\ x = \frac{4}{5} \\ x = 0.8[/tex]

Пошаговое объяснение:

3/5х = 1

х = 1 : 3/5

х = 1 * 5/3

х = 5/3

х = 1 2/3

3/7х = 1/2

х = 1/2 : 3/7

х = 1/2 * 7/3

х = 7/6

х = 1 1/6

5/6х = 2/3

х = 2/3 : 5/6

х = 2/3 * 6/5

х = 12/15

х = 4/5