Răspuns :
{[(a·16)+ 18]: 2 - 23}·3= 6
{[(a·16)+ 18]: 2- 23} = 6:3
[(a·16)+ 18]: 2- 23 = 2
[(a·16)+ 18]: 2 = 2+ 23
[(a·16)+ 18 ]: 2 = 25
(a·16)+ 18 =25·2
(a· 16 )+ 18 =50
a·16 = 50- 18
a·16 = 32
a = 32: 16
a = 2
{[(a·16)+ 18]: 2- 23} = 6:3
[(a·16)+ 18]: 2- 23 = 2
[(a·16)+ 18]: 2 = 2+ 23
[(a·16)+ 18 ]: 2 = 25
(a·16)+ 18 =25·2
(a· 16 )+ 18 =50
a·16 = 50- 18
a·16 = 32
a = 32: 16
a = 2