(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