(1*7/10)Х=2 1/4
(10/10-7/10)*х=2 1/4
3/10*х=2 1/4
х=9/4:3/10
х=9/4*10/3
х=15/2
х=7 1/2
(1/4+1/5)Х=1 4/5
5/20х+4/20х=9/5
9/20х=36/20
20х=36/20 : 9
20х=4/20
х=4/20 : 20/1
х=4/1
х=4
(3 1/12+1 3/4)Х=2 1/6
(37/12+ 7/4)х = 2 1/6
2 1/6 = 13/6
7/4х = 37/12-13/6
7/4х = 11/12
х = 11/12 : 7/4
х= 11/21
(2 1/12+1 5/6)Х=3/4
(25/12 + 22/12)х = 3/4
22/12х = 25/12-3/4
22/12х = 16/12 = 1 4/12 = 1 1/3
х= 1 1/3 : 22/12
х= 8/11
решение на фото
Пошаговое объяснение:
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