x+(.09)x=400

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Solution for x+(.09)x=400 equation: 


Simplifying
x + (0.09) * x = 400

Combine like terms: x + 0.09x = 1.09x
1.09x = 400

Solving
1.09x = 400

Solving for variable 'x'.

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

Divide each side by '1.09'.
x = 366.9724771

Simplifying
x = 366.9724771

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