2 1/6+5 14/15= 13/6+89/15=5*13/60+89*2/60=65/60+178/60=243/60=81/20=4 1/20
4 5/18-0.7=77/18-7/10=77*5/90-7*9/10=385/90-63/90=322/90=161/45=3 26/45
7 7/30-(3 2/15-1 5/12)=217/30-(47/15-17/12)=217/30-(4*47/60-5*17/60)=217/30-103/60=217*2/60-103/60=331/60=5 31/60
(х+5/12)-1 1/6=1.25
х+5\12=125/100+7/6
х+5/12=125*3/300+7*50/300
х+5/12=375/300+350/300
х+5\12=725/300
х+5/12=145/60
х+5/12=29/12
х=29/12-5/12
х=24/12=2
1 7/8х-2 1/3)*24=4
15/8х-7/3=4:24=1/6
15/8х=1/6+7/3
15\8х=1/6+7*2/6
15/8х=15/6
х=15/6:15/8
х=15/6*8/15
х=8/6=1 1/3