2x = 18

(a)  

x - 3 = 6

(a)  

x/2 = 4

(a)  

4x - 5 = 15

(a)  

5 + x = 13

6x = 24

(a)  

x - 7 = 2

(a)  

2x + 4= 16

(a)  

5х=25-5

(a)