Пошаговое объяснение:
1) 1/3х+1/4х-1/5х= 1 8/15
20/60х+15/60х-12/60х= 23/15
23/60х=23/15
х= 23/15*60/23
х=4
2) 1 8/9х+2 2/15= 4 29/30
17/9х= 149/30- 32/15
17/9х= 149/30- 64/30
17/9х= 85/30
х= 85/30*9/17
х= 9/6
х= 3/2
х= 1 1/2
3) 2 1/3- 1/24х= 13/16
- 1/24х= 13/16-7/3
-1/24х= 39/48- 112/48
-1/24х= -73/48
х= 73/48* 24
х= 73/2
х= 36 1/2
4) 1 1/6х- 11/18= 5/12
7/6х= 5/12+11/18
7/6х= 15/36+ 22/36
7/6х= 37/36
х= 37/36*6/7
х= 37/42
