1.Уровнение:
e : 5 = 178
e = 178 • 5
e = 890
__________
890 : 5 = 178
178 = 178
2.Уровнение:
x - 532 = 365
x = 365 + 532
x = 897
___________
897 - 532 = 365
365 = 365
3.Уровнение
817 - c = 498
c = 817 - 498
c = 319
___________
817 - 319 = 498
498 = 498