Ответ:
Пошаговое объяснение:
1) 12×2 1/6 = 12 * 13/6 = 2 * 13 = 26
4) 24×5 5/12 = 24 * 65/12 = 2 * 65 = 130
2) 14×2 11/14 = 14 * 39/14 = 39
5) 11×1 1/22 = 11 * 23/22 = 23/2 = 11 1/2
3) 5×2 1/25 = 5 * 51/25 = 51/5 = 10 1/5
6) 15×1 1/30 = 15 * 31/30 = 31/2 = 15 1/2
1/2+3/5-2/3=
1/2+3/5=11/10
11/10-2/3=13/30
5/9+1/6+3/4=
5/9+1/6=13/18
13/18+3/4=53/36
1/4+1/5-3/10=
1/4+1/5=9/20
9/20-3/10=3/20
(2/3)/(4/9 х - 4/9) +1/20=4/5
(2/3)/(4/9 х - 4/9)=16/20 - 1/20
2/(3(4/9 х-4/9)=15/20=3/4
2 * 3/4=3*3(4/9 х - 4/9)
3/2=9 * 4/9*(х-1)
3/2=4(х-1)
3=4*2(х-1)
х-1=3/8
х=3/8+1
х=1 3/8
(5/7)/(6/7 х+3/7) -1/2=1/6
5/(7*3/7(2х+1)) =1/6+3/6
5/(3(2х+1))=4/6=2/3
5=2(2х+1)
2х+1=5/2
2х=2 1/2 - 1
2х=1 1/2
х=1 1/2 : 2
х=3/2 * 1/2
х=3/4