X+(X*.1)=420

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Solution for X+(X*.1)=420 equation:


Simplifying
X + (X * 0.1) = 420

Reorder the terms for easier multiplication:
X + (0.1X) = 420

Combine like terms: X + (0.1X) = 1.1X
1.1X = 420

Solving
1.1X = 420

Solving for variable 'X'.

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

Divide each side by '1.1'.
X = 381.8181818

Simplifying
X = 381.8181818

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