To solve this equation, we will first distribute the constants on the left side of the equation:

3(0.9x - 1) - (x + 0.6) = -0.2
2.7x - 3 - x - 0.6 = -0.2

Now combine like terms:

2.7x - x - 3 - 0.6 = -0.2
1.7x - 3.6 = -0.2

Add 3.6 to both sides:

1.7x = 3.4

Divide by 1.7 to solve for x:

x = 3.4 / 1.7
x = 2

Therefore, the solution to the equation is x = 2.