x-(x*0.2)=100*0.2

Solution for x-(x*0.2)=100*0.2 equation:

Simplifying
x + -1(x * 0.2) = 100 * 0.2

Reorder the terms for easier multiplication:
x + -1(0.2x) = 100 * 0.2

Remove parenthesis around (0.2x)
x + -1 * 0.2x = 100 * 0.2

Multiply -1 * 0.2
x + -0.2x = 100 * 0.2

Combine like terms: x + -0.2x = 0.8x
0.8x = 100 * 0.2

Multiply 100 * 0.2
0.8x = 20

Solving
0.8x = 20

Solving for variable 'x'.

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

Divide each side by '0.8'.
x = 25

Simplifying
x = 25