0.2+X-0.2X=0.9

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Solution for 0.2+X-0.2X=0.9 equation: 


Simplifying
0.2 + X + -0.2X = 0.9

Combine like terms: X + -0.2X = 0.8X
0.2 + 0.8X = 0.9

Solving
0.2 + 0.8X = 0.9

Solving for variable 'X'.

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

Add '-0.2' to each side of the equation.
0.2 + -0.2 + 0.8X = 0.9 + -0.2

Combine like terms: 0.2 + -0.2 = 0.0
0.0 + 0.8X = 0.9 + -0.2
0.8X = 0.9 + -0.2

Combine like terms: 0.9 + -0.2 = 0.7
0.8X = 0.7

Divide each side by '0.8'.
X = 0.875

Simplifying
X = 0.875

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