1. **State the problem:** We have a net of a cube with edges labeled A, B, C, D, E, F, and X. We need to determine which edge joins with edge X when the net is folded into a cube. 2. **Understand the cube net:** A cube has 6 faces and 12 edges. When folded, edges that share a vertex in the net will join. 3. **Analyze the net layout:** The net is arranged as: Top row: A B Middle row: X C Bottom row: F D Side row: E 4. **Identify adjacent faces:** Edge X is adjacent to faces A, B, C, and F in the net. 5. **Determine which edge joins X:** When folded, edge X will join the edge opposite it on the cube. By visualizing the fold, edge X joins edge E. **Final answer:** Edge X joins with edge E when the net is folded into a cube.