0.4x+3+-0.8=0.2

Solution for 0.4x+3+-0.8=0.2 equation:

Simplifying
0.4x + 3 + -0.8 = 0.2

Reorder the terms:
3 + -0.8 + 0.4x = 0.2

Combine like terms: 3 + -0.8 = 2.2
2.2 + 0.4x = 0.2

Solving
2.2 + 0.4x = 0.2

Solving for variable 'x'.

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

Add '-2.2' to each side of the equation.
2.2 + -2.2 + 0.4x = 0.2 + -2.2

Combine like terms: 2.2 + -2.2 = 0.0
0.0 + 0.4x = 0.2 + -2.2
0.4x = 0.2 + -2.2

Combine like terms: 0.2 + -2.2 = -2
0.4x = -2

Divide each side by '0.4'.
x = -5

Simplifying
x = -5