Solve the geometric problem. See Example 3. See the Strategy for Solving Word Problems box on page 91.
Perimeter of a lot. Having finished fencing the perimeter of a triangular piece of land, Lance observed that the second side was just 10 feet short of being twice as long as the first side, and the third side was exactly 50 feet longer than the first side. If he used 684 feet of fencing, what are the lengths of the three sides?
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