64-(3n+8n+n):40=37 уравнение
64-(3n+8n+n):40=37
(3n+8n+n):40= 64 - 37
12n : 40 = 27
12n = 27* 40
12n = 1080
n = 90
Проверка:
64 - (3 * 90 + 8 * 90 + 90) : 40 = 64 - 1080 : 40 = 64 - 27 = 37
37 = 37
64-(3п+8п+п):40=37
(3n+8n+n):40=64-37
12п:40=27
12п=27*40
12п=1080
п=1080:12
п=90