x-0.21x=505.60

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Solution for x-0.21x=505.60 equation: 


Simplifying
x + -0.21x = 505.60

Combine like terms: x + -0.21x = 0.79x
0.79x = 505.60

Solving
0.79x = 505.60

Solving for variable 'x'.

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

Divide each side by '0.79'.
x = 640

Simplifying
x = 640

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