6300 - n:12 = 5470
n:12 = 6300 - 5470
n:12 = 830
n= 830 * 12
n = 9960
------------------------------
6300 - 9960:12 = 5470
6300 - 830 = 5470
5470=5470
884 : 26 +р = 1600
34 +р = 1600
р= 1600 - 34
р = 1566
---------------------------------
884 : 26 + 1566 = 1600
34 + 1566 = 1600
1600=1600
(1908 +t) : 25 = 80
1908+t = 80*25
1908 +t =2000
t= 2000-1908
t= 92
-------------------------------
(1908 + 92) : 25 = 80
2000 : 25 = 80
80=80