Question

{[(a+3)×3+3]×3+3}×3+3=201

Answer 1

{[(a+3)×3+3]×3+3}×3+3=201

{[(a+3)×3+3]×3+3}×3=201-3

{[(a+3)×3+3]×3+3}×3=198

[(a+3)×3+3]×3+3=198:3

[(a+3)×3+3]×3+3=66

[(a+3)×3+3]×3=66-3

[(a+3)×3+3]×3=63

(a+3)×3+3=63:3

(a+3)×3+3=21

(a+3)×3=21-3

(a+3)×3=18

a+3=18:3

a+3=6

a=6-3

a=3