Найдите неизвестное число:
а) 18 * x = 450;
б) x * 23 = 2346;
в) 1190 : x = 34;
г) x : 17 = 201;
д) 25 * x = 20200;
е) 21840 : x = 52.
18 * x = 450
x = 450 : 18
x = 25
x * 23 = 2346
x = 2346 : 23
x = 102
1190 : x = 34
x = 1190 : 34
x = 35
x : 17 = 201
x = 201 * 17
x = 3417
25 * x = 20200
x = 20200 : 25
x = 808
21840 : x = 52
x = 21840 : 52
x = 420