x-.2x=20

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Solution for x-.2x=20 equation: 


Simplifying
x + -0.2x = 20

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

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