How to do problem no. 180 from Math Counts School Handbook 2011 2012

Team: 
The Lifes
Topic: Coordinate Geometry
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How to do problem no. 182 from Math Counts School Handbook 2011 2012.

Common Core Standards: 6.G.1
Problem #: 
180 (2011-2012)
Problem Difficulty Level: 4 [?]