300=x+(x*.2)

Solution for 300=x+(x*.2) equation:

Simplifying
300 = x + (x * 0.2)

Reorder the terms for easier multiplication:
300 = x + (0.2x)

Combine like terms: x + (0.2x) = 1.2x
300 = 1.2x

Solving
300 = 1.2x

Solving for variable 'x'.

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

Add '-1.2x' to each side of the equation.
300 + -1.2x = 1.2x + -1.2x

Combine like terms: 1.2x + -1.2x = 0.0
300 + -1.2x = 0.0

Add '-300' to each side of the equation.
300 + -300 + -1.2x = 0.0 + -300

Combine like terms: 300 + -300 = 0
0 + -1.2x = 0.0 + -300
-1.2x = 0.0 + -300

Combine like terms: 0.0 + -300 = -300
-1.2x = -300

Divide each side by '-1.2'.
x = 250

Simplifying
x = 250