108=x-(.2x)

Solution for 108=x-(.2x) equation:

Simplifying
108 = x + -1(0.2x)

Remove parenthesis around (0.2x)
108 = x + -1 * 0.2x

Multiply -1 * 0.2
108 = x + -0.2x

Combine like terms: x + -0.2x = 0.8x
108 = 0.8x

Solving
108 = 0.8x

Solving for variable 'x'.

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

Add '-0.8x' to each side of the equation.
108 + -0.8x = 0.8x + -0.8x

Combine like terms: 0.8x + -0.8x = 0.0
108 + -0.8x = 0.0

Add '-108' to each side of the equation.
108 + -108 + -0.8x = 0.0 + -108

Combine like terms: 108 + -108 = 0
0 + -0.8x = 0.0 + -108
-0.8x = 0.0 + -108

Combine like terms: 0.0 + -108 = -108
-0.8x = -108

Divide each side by '-0.8'.
x = 135

Simplifying
x = 135