Question

Решит и пропорции а) 7/8=х/6 б) 13/15=х/10 в) 12/21=х/14

Answer 1

1)
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

Answer 2

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