Х+5/3=9-7х+2/5
х+7х=9+2/5-1 2/3
8х=9 6/15-1 10/15
8х=8 21/15-1 10/15
8х=7 11/15
х=116/15:8
х=29/30
Hall for to going vase problem to go did for the 12
(1/2:3/4-4/9):3/5=(1/2*4/3-4/9)*5/3=(2/3-4/9)*5/3=(6-4)/9*5/3=10/27
1/2:3/8-4/9:3/5=(1*8)/(2*3)-(4*5)/9*3)=8/6-20/27=(72-40)/54=32/54=16/27
1)=
2)<
3)=
4)<
5)<
6)>
вот так как-то