23/5х+92/65-12/5=1/3
(299+92х-156х)/65=1/3
299-64х=65/3
-64х=-832/3
х=832/3*64
х=13/3 или 4 целых 1/3
2 3\5:(х+1 3\4)=1 11/15
x+1 3/4=2 3/5:1 11/15
x+7/4=13/5*15/26
x+7/4=3/2
x=3/2-7/4
x=6/4-7/4
x=-1/4
23/5х+92/65-12/5=1/3
(299+92х-156х)/65=1/3
299-64х=65/3
-64х=-832/3
х=832/3*64
х=13/3 или 4 целых 1/3