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.
1) 1 3/5z+z = 2 3/5z
2) 2 3/5z - 4/15z = 50/15z
3)50/15z + 7/6 z = 135/30z
4) 135/30z=2 1/3
упростили, получилось
135/30*z=2 1/3
решаем:
135/30*z=2 1/3
z=2 1/3 : 135/30 = 7/3 * 30/135 = 7*10*3 / 3*135 = 70/135 = 14/27