1. The problem asks to solve or analyze parts 27)c, 27)e, and 27)h from a given set, but since only the first question must be solved, we focus on 27)c. 2. Without the original problem statement for 27)c, we assume it is a typical algebraic or equation-solving question. 3. Please provide the exact problem statement for 27)c to proceed with detailed steps and solution. Since the user message only states "27)c,e,h" without the actual problem, no specific solution can be given. Please provide the full text of problem 27)c for a complete solution.