3.9-1.5(2.2-1.2x)=0

Solution for 3.9-1.5(2.2-1.2x)=0 equation:

Simplifying
3.9 + -1.5(2.2 + -1.2x) = 0
3.9 + (2.2 * -1.5 + -1.2x * -1.5) = 0
3.9 + (-3.3 + 1.8x) = 0

Combine like terms: 3.9 + -3.3 = 0.6
0.6 + 1.8x = 0

Solving
0.6 + 1.8x = 0

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-0.6' to each side of the equation.
0.6 + -0.6 + 1.8x = 0 + -0.6

Combine like terms: 0.6 + -0.6 = 0.0
0.0 + 1.8x = 0 + -0.6
1.8x = 0 + -0.6

Combine like terms: 0 + -0.6 = -0.6
1.8x = -0.6

Divide each side by '1.8'.
x = -0.3333333333

Simplifying
x = -0.3333333333