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type TR at command then right click and click the line you want to delete
I agree with specialties answers
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Thanks
https://knowledge.autodesk.com/support/autocad/learn-explore/caas/CloudHelp/cloudhelp/2015/ENU/AutoCAD-Core/files/GUID-B1A185EF-07C6-4C53-A76F-05ADE11F5C32-htm.html
Trims objects to meet the edges of other objects.
Find
To trim objects, select the boundaries. Then press Enter and select the objects that you want to trim. To use all objects as boundaries, press Enter at the first Select Objects prompt.
The following prompts are displayed.
Specifies one or more objects to be used as a boundary for the trim. TRIM projects the cutting edges and the objects to be trimmed onto the XYplane of the current user coordinate system (UCS).
Note: To select cutting edges that include blocks, you can use only the single selection, Crossing, Fence, and Select All options.
Select objectsSpecifies objects individually.Select allSpecifies that all objects in the drawing can be used as a trim boundary.
Specifies the object to trim. If more than one trim result is possible, the location of the first selection point determines the result.
Thank you for the invitation, I apologized for the answer I leave the answer for the professionals
