1) you can’t live without doing such stupid things.
2) try to avoid being in bad mood.
3) if you want to lose your weight stop eating a lot.
4) i don’t like being late for work.
5) he tried to calm her down promising to return soon.
6) in arabic countries this is a common way of camels’ moving.
7) he is not good at driving.
8) i don’t feel like doing shopping.
х=480:120
х=4
х*13=280
х=280:13
х=21 7/13
840:х=42
х=840:42
х=20
х:16=80
х=80*16
х=1280