Răspuns :
Notam numarul cu x.
[(x:5) + 32:8] - (12:4 + 24:4) = 25:5
[(x:5) + 4] - (3 + 6) = 5
[(x:5) + 4] - 9 = 5
(x:5) + 4 = 5 + 9
(x:5) + 4 = 14
x:5 = 14-4
x:5 = 10
x = 10*5
x = 50
[(x:5) + 32:8] - (12:4 + 24:4) = 25:5
[(x:5) + 4] - (3 + 6) = 5
[(x:5) + 4] - 9 = 5
(x:5) + 4 = 5 + 9
(x:5) + 4 = 14
x:5 = 14-4
x:5 = 10
x = 10*5
x = 50