Question

397+72/(12-x)=405
Решите уравнение по шагам

Answer 1

72/(12-х) = 405-397

72/(12-х) = 8

72 = 8(12-х)

72/8 = 12-х

9 = 12-х

х = 12-9

х = 3
Ответ: х=3

Answer 2

397+72/(12-х)=405
72/(12-х)=405-397=8
12-х=72/8=9
-х=9-12=-3
х=3