How do you guys navigate the back talk and whining?

I am trying so hard to not lose my temper, but EVERYTHING I say has a remark or a but I don’t want to in a whine. I just want her to eat breakfast and get ready for school. I just don’t understand because she knows the routine, she cried when I asked her to get her socks and shoes. I don’t want to get upset with her and send her to school in a bad mood. I get so frustrated that I have to walk away and do breathing exercises. I feel like I need to nip the back talk in the butt before it gets worse but idk how to approach it. I have tried changing her night routine to allow more sleep, I make the morning as easy as possible by laying out clothes and getting backpack ready the night before, she has breakfast already done and waiting for her. All she has to do is get dressed, eat, brush her teeth and hair and put on deodorant. I don’t know what else to do.