Problem
4. If \( Y \) is the midpoint of \( X Z, Y \) is located at \( (3,-1) \), and \( Z \) is located at \( (11,-5) \), find the coordinates of \( X \).
Solution
Step 1 ：\(x = 2(3) - 11\)
Step 2 ：\(y = 2(-1) - (-5)\)
Step 3 ：\(x = -5, y = 3\)
