300=x-0.2x

Solution for 300=x-0.2x equation:

Simplifying
300 = x + -0.2x

Combine like terms: x + -0.2x = 0.8x
300 = 0.8x

Solving
300 = 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.
300 + -0.8x = 0.8x + -0.8x

Combine like terms: 0.8x + -0.8x = 0.0
300 + -0.8x = 0.0

Add '-300' to each side of the equation.
300 + -300 + -0.8x = 0.0 + -300

Combine like terms: 300 + -300 = 0
0 + -0.8x = 0.0 + -300
-0.8x = 0.0 + -300

Combine like terms: 0.0 + -300 = -300
-0.8x = -300

Divide each side by '-0.8'.
x = 375

Simplifying
x = 375