(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=4/33/3-4/3= -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=5/214/9-5/12=16/36-15/36=1/365/21×36/1=60/7=8 4/7(1/4+1/5)x=1 4/51/4+1/5=5/20+4/20=9/20x=9/5×20/9x=4(2 1/12 - 1 5/6)x=3/42 1/12-1 5/6=1+(1/12-10/12)=1-3/4=1/4x=3/4×4/1=3