Помогите! пропорция!! 4 и 5

Question

Помогите! пропорция!! 4 и 5

---

Answer 1

Решение внизу на фото

---

Answer 2

1) 2(8x + 5.2) = 2.4 * 11

16x + 10.4 = 26.4

16x = 26.4 - 10.4

16x = 16

x = 16 : 16

x = 1

2) 4 * 10.4 = 1.6(7x-2)

41.6 = 11.2x - 3.2

-11.2x = -44.8

x= -44.8 : (-11.2x)

x = 4