(1-4/9 : 1/3 - 1/4 )
(5/7 - 2/3) :(4/9-5/12

2)
(1/4+1/5)x = 1 4/5



(2 1/12 - 1 5/6)x = 3/4


если можете Сфотографируйте пж

(1-4/9 : 1/3 - 1/4 )
4/9:1/3=4/9×3/1=4/3
3/3-4/3= -1/3
-1/3-1/4=-4/12-3/12= -7/12

(5/7 - 2/3) :(4/9-5/12)
5/7-2/3=15/21-10/21=5/21
4/9-5/12=16/36-15/36=1/36
5/21×36/1=60/7=8 4/7


(1/4+1/5)x=1 4/5
1/4+1/5=5/20+4/20=9/20
x=9/5×20/9
x=4


(2 1/12 - 1 5/6)x=3/4
2 1/12-1 5/6=1+(1/12-10/12)=1-3/4=1/4
x=3/4×4/1=3