Ответ:

а) x = 0.05

б) x = 5.02

в) x = 11.6

г) x = 0.025

Пошаговое объяснение:

a) 6x = 0.3

x = 0.3 / 6

x = 0.05

б) x + x + x = 15.06

3x = 15.06

x = 5.02

в) 0.4x + 1.1x + 0.3x = 20.88

1.8x = 20.88

x = 20.88 / 1.8

x = 11.6

г) 3.2 : (0.05x : 0.1) + 3.56 = 3.72

3.2 : 0.5x = 3.72 - 3.56

6.4x = 0.16

x = 0.16 / 6.4

x = 0.025