120-100%
x -98.65%
100x=120×98.65
100x=11.838
x=11.838÷100
x=118.38
12 и 15
15=3*5
12=2*2*3
НОК(12, 15)=3*5*2*2=60
1) 56:4 = 14
2) 12 + 14 = 26
3) 27*3 = 81
4) 28:4 = 7
5) 81 - 26 = 55
6) 55 - 7 = 48
Ответ 48
6а^2+aв-5а.....................................................