a - 8 × 3 = 40
a - 24 = 40
a = 40 + 24 = 64
___________
25 - a × 3 = 4
25 - 3a = 4
- 3a = 4 - 25
- 3a = - 21
a = 21 : 3 = 7
___________
14 + 3 × a = 29
3a = 29 - 14
3a = 15
a = 15 : 3 = 5
___________
a × a × a = 8
a³ = 2³
a = 2
___________
a × a × a = 27
a³ = 3³
a = 3
___________
a : a × a = 2
a = 2