ПОМОГИТЕ!! ДАЮ 50 баллов!!!!!!!!!!!! Уравнение!

Question

ПОМОГИТЕ!! ДАЮ 50 баллов!!!!!!!!!!!! Уравнение!

---

Answer 1

1/9z + 7/18z - 11/27z = 2 1/2 + 5/18z
6/54z + 21/54z - 22/54z - 15/54z = 5/2
- 10/54z = 5/2
 z = 5/2 : (-10/54z)
 z = - 27/2
 z = - 13 1/2
----------------------------------------------------
a - 11/18a = 1/3 - 7/18a +1 5/18a
a - 11/18a + 7/18a - 23/18a = 1/3
- 1/2a = 1/3
   a = - (1/3 : 1/2)
   a = - 2/3

Answer 2

(1/9 + 7/18 -11/27 - 5/18)z = 5/2
(3/27 + 3/27 - 11/27)z = 5/2
-5/27 * z = 5/2
z = -(5/2):(5/27)
z = -(5/2)*(27/5)
z = -27/2 = -13.5

2)
(1 - 11/18 + 7/18 - 23/18)a = 1/3
(18/18 - 27/18)a = 1/3
-1/2 * a = 1/3
a = -(1/3):(1/2)
a = -(1/3)*2 = -2/3