Re: Partition Manager: Unable to resize linux partition to use free space BEFORE part
First, that doesn't look like GParted, which is what most people use for this task. OTOH, perhaps it is, but just using a theme that makes it look different. If it's not GParted, though, and if the below suggestion doesn't help, you might try using GParted rather than whatever it is you're using.
Second, I notice that in your second and third screen shots, although you've changed the "Free space before" field, the "Size" field hasn't changed. This can sometimes happen if, as it appears you did, you change one field by typing its entry and don't click in another field. Clicking in another field registers your change and usually causes the program to recompute anything it needs to recompute. Thus, I suggest you do that. Alternatively, try using the graphic at the top of the dialog box to resize the extended partition. You can do this in GParted; when you move your mouse over the left end, the pointer should change to an arrow to indicate that you can click and drag to resize the partition.
If I've suggested a solution to a problem and you're not the original poster, do not try my solution! Problems can seem similar but be different, and a good solution to one problem can make another worse. Post a new thread with your problem details.