(z-2) + (z-1) + z = -3z-2+z-1+z=-33z=-3+2+13z=0z=0 1\5x +11 =1 -3\5x |*55x+55=5-15x5x+15x=5-5520x=-50x=-2.58-1\4z = 1-1/4=1-8-1/4=-7x=283- 5\7t = 1 - 3\7t |*721-35t=7-21t-35t+21t=7-21-14t=-14t=11\8u - 2 = 5\8u +1 |*88u-16=40u+88u-40u=8+16-32u=24u=-0.752\5z -7 =3 2/5z=3+72/5z=10z=4
(z-2) + (z-1) + z = -3
z-2+z-1+z=-3
3z=-3+2+1
3z=0
z=0
1\5x +11 =1 -3\5x |*5
5x+55=5-15x
5x+15x=5-55
20x=-50
x=-2.5
8-1\4z = 1
-1/4=1-8
-1/4=-7
x=28
3- 5\7t = 1 - 3\7t |*7
21-35t=7-21t
-35t+21t=7-21
-14t=-14
t=1
1\8u - 2 = 5\8u +1 |*8
8u-16=40u+8
8u-40u=8+16
-32u=24
u=-0.75
2\5z -7 =3
2/5z=3+7
2/5z=10
z=4