а)
7/8=х/6
8 * x = 7 * 6
8x = 42
x = 42 : 8
x = 5,25
б)
13/15=х/10
15 * x = 13 * 10
15x = 130
x = 130 : 15
x = 8 2/3
в)
12/21=х/14
21 * x = 14 * 12
21x = 168
x = 168 : 21
x = 8
а)
7/8=х/6
8 * x = 7 * 6
8x = 42
x = 42 : 8
x = 5,25
б)
13/15=х/10
15 * x = 13 * 10
15x = 130
x = 130 : 15
x = 8 2/3
в)
12/21=х/14
21 * x = 14 * 12
21x = 168
x = 168 : 21
x = 8
7/8=x/6
42=8x
8x=42
x=5,25
2)
13/15=x/10
130=15x
15x=130
x=8 2/3
3)
12/21=x/14
4/7=x/14
56=7x
7x=56
x=8