0.8x-0.4(4-x)=3.8

Solution for 0.8x-0.4(4-x)=3.8 equation:

Simplifying
0.8x + -0.4(4 + -1x) = 3.8
0.8x + (4 * -0.4 + -1x * -0.4) = 3.8
0.8x + (-1.6 + 0.4x) = 3.8

Reorder the terms:
-1.6 + 0.8x + 0.4x = 3.8

Combine like terms: 0.8x + 0.4x = 1.2x
-1.6 + 1.2x = 3.8

Solving
-1.6 + 1.2x = 3.8

Solving for variable 'x'.

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

Add '1.6' to each side of the equation.
-1.6 + 1.6 + 1.2x = 3.8 + 1.6

Combine like terms: -1.6 + 1.6 = 0.0
0.0 + 1.2x = 3.8 + 1.6
1.2x = 3.8 + 1.6

Combine like terms: 3.8 + 1.6 = 5.4
1.2x = 5.4

Divide each side by '1.2'.
x = 4.5

Simplifying
x = 4.5