Write an expression that represents the length of the missing side of this rectangle. Its area is 
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Definitions:
Problem Solving
The process of identifying a problem, developing possible solutions, and choosing and implementing the best solution.
Diplomatic
Pertaining to the conduct of relations between nations, often involving negotiation and the management of international relations.
Writing Technique
The method or style adopted by a writer to communicate their message effectively.
Active
Engaged in action or activity; not passive or idle.
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