<span>11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97 - вроде все</span>
(13/30 - 11/20)* 9/5= - 7/60 * 9/5= - 21/100
X+25>40
x>40-25
x>15
[15;+∞)
3.7z-z=0,54
2,7z=0,54
z=0,2
378 = 2*3*3*3*7
396= 2*2*3*3*11
НОД(378 и 396) = 2*3*3 = 18
НОК(378 и 396) = 18*2*3*7*11= 8316