At the moment I'm working on a project where the input was always symmetrical. Symmetrical meaning that the right side is always the same as the left side.
Now we got another requirement, that the left side in can vary from the right side and this only in some cases.
To illustrate the Problem I've done some Balsamiq Wireframes. In every solution that i found so far there is a flaw. And i just don't find a solution that is simple for the user to understand and doesn't feel hectic on the UI.
Is there any suggestion how to handle this situation?
Asymmetrical Problem With Left/Right and Both
Solution 1: With labels
Solution 2: Wide input
Solution 3: Shifting to center