O=7n-21

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Solution for O=7n-21 equation: 


Simplifying
O = 7n + -21

Reorder the terms:
O = -21 + 7n

Solving
O = -21 + 7n

Solving for variable 'O'.

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

Simplifying
O = -21 + 7n

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