Question

{[(a+3)×3+3]×3+3}×3+3=282

Answer 1

{[(a+3)*3+3]*3+3}*3=279
{[(a+3)*3+3]*3+3}=93
[(a+3)*3+3]*3=90
[(a+3)*3+3]=30
(a+3)*3=27
a+3=9
a=6

Answer 2

{[(a+3)×3+3]×3+3}×3=282-3
{[(a+3)×3+3]×3+3}=279÷3
{[(a+3)×3+3]×3+3}=93
[(a+3)×3+3]×3=93-3
[(a+3)×3+3]=90÷3
[(a+3)×3+3]=30
(a+3)×3=30-3
(a+3)=27÷3
a+3=9
a = 9-3
a=6
Nu știu dacă este foarte corect dar...na! :)