1/7x*2целых 4/5=4/5 -4*(x+8)-2=-3(5-x)

1/7х * 2 4/5 = 4/5
1/7х * 14/5 = 4/5
1/7х = 4/5 : 14/5 = 4/5 * 5/14 = 4/14 = 2/7
х = 2/7 : 1/7 = 2/7 * 7/1 = 2
х = 2
Проверка: (1/7 * 2) * 2 4/5 = 2/7 * 14/5 = (2*2)/(1*5) = 4/5

- 4 * (х + 8) - 2 = - 3 * (5 - х)
- 4х - 32 - 2 = - 15 + 3х
- 4х - 3х = - 15 + 32 + 2
- 7х = 19
х = 19 : (-7) = - 19/7
х = - 2 целых 5/7