(5/6-3/8):3/4-(3/8+7/20):1 9/20 помогите решить

Question

(5/6-3/8):3/4-(3/8+7/20):1 9/20 помогите решить

Answer 1

(5/6-3/8):3/4-(3/8+7/20):1 9/20 =1/9

1)5/6-3/8=20/24-9/24=11/24
2)3/8+7/20=15/40+14/40=29/40
3)11/24:3/4=11/24·4/3=11/18
4)29/40:1 9/20 =29/40·20/29=1/2
5)11/18-1/2=11/18-9/18=2/18=1/9

Answer 2

5/6 - 3/8 = 20+9/24=29/24 29/24 : 3/4 = 29/24 * 4/3 = 29/18 3/8 + 7/20 = 15+14/40 = 29/40 29/40 : 19/20 = 29/40 * 20/19 = 29/38 29/18 - 29/38 = 9918/342 - 551/342 = 9367/342