2. A pan balance shows \( 7+5=12 \) if 4 units are removed from one side, what needs to be dont to the other side to keep the pars balanced?

To maintain the balance after removing 4 units from one side, you should **also remove 4 units from the other side**. **Here's the reasoning:** 1. **Initial Balance:** - **Left Pan:** 7 + 5 = 12 units - **Right Pan:** 12 units - The pans are balanced because both sides equal 12 units. 2. **After Removing 4 Units from One Side:** - **Left Pan:** 12 - 4 = 8 units - **Right Pan:** Remains at 12 units 3. **To Restore Balance:** - **Right Pan:** Needs to be adjusted to also equal 8 units. - **Action Required:** Remove 4 units from the right pan (12 - 4 = 8 units). By removing 4 units from both sides, both pans will have 8 units each, maintaining the balance. **Summary:** **Remove 4 units from the other side as well to keep both pans balanced.**