Răspuns :
a
{[(a/3)-1] /3} + 5= 61
{[(a/3)-1] /3} =61-5
{[(a/3)-1] /3} =56
[(a/3)-1] =56*3
[(a/3)-1] =168
a/3=168+1
a/3=169
a=169*3
a=507
(n:3-1):3+5 = 61
(n:3-1):3 = 61-5 = 56
n:3-1 = 56x3 = 168
n:3 = 168+1 = 169
n = 169x3 = 507
a
{[(a/3)-1] /3} + 5= 61
{[(a/3)-1] /3} =61-5
{[(a/3)-1] /3} =56
[(a/3)-1] =56*3
[(a/3)-1] =168
a/3=168+1
a/3=169
a=169*3
a=507
(n:3-1):3+5 = 61
(n:3-1):3 = 61-5 = 56
n:3-1 = 56x3 = 168
n:3 = 168+1 = 169
n = 169x3 = 507