1) 1376: (34 - х) =86 2)) 9680 : (х+219) = 16
1376 : 86 = 16 9680 : 16 = 605
34 - х = 16 х + 219 = 605
х =34-16 х = 605 - 219
х = 18 х = 386
3)) (х - 57) : 29 = 205
х-57= 205 * 29
х-57= 5945
х = 5945 + 57
х = 6002
4)) (х-72)*9=927
х-72 = 927: 9
х- 72 = 103
х = 103+72
х = 175
1)1/12-1/13=13/156-12/156=1/156
2)1/13-1/14=14/182-13/182=1/182
3)1/156:1/182=1/156*182/1=91/78
4)1/14-1/15=15/210-14/210=1/210
5)91/78*1/10=1/180
6)1/15-1/16=16/240-15/240=1/240
7)1/180:1/240=1/180*240/1=4/3=1 1/3