P-.20P=640

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Solution for P-.20P=640 equation: 


Simplifying
P + -0.20P = 640

Combine like terms: P + -0.20P = 0.8P
0.8P = 640

Solving
0.8P = 640

Solving for variable 'P'.

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

Divide each side by '0.8'.
P = 800

Simplifying
P = 800

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