3 * 0.9x - 3 * 1 - x - 0.6 = -0.2

2.7x - 3 - x - 0.6 = -0.2

2.7x - x = -0.2 + 3 + 0.6

x(2.7 - 1) = 3.4

1.7x = 3.4

x = 3.4 : 1.7

x = 2