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
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