1190: c=34,b: 17=201,1881: k=19,25*x=20200,21840: d=52,30*b=23310 !

1190 : с = 34
с = 1190 : 34
с = 35

b : 17 = 201
b = 201 • 17
b = 3417

1881 : k = 19
k = 1881 : 19
k = 99

25 • x = 20200
x = 20200 : 25
x = 808

21840 : d = 52
d = 21840 : 52
d = 420

30 • b = 23310
b = 23310 : 30
b = 777