Question

resolver
8/20=10/x

25/x=15/9

x/21=12/28

Answer 1

8/20 = 10/x
8 (x) = 20 (10)
8x = 200
x = 200/8
x = 25

25/x = 15/9
25 (9) = x (15)
225 = 15x
225/15 = x
15 = x
x = 15

x/21 = 12/28
x (28) = 21 (12)
28x = 252
x = 252/28
x = 9

Answer 2

1) 8/20=10/x 8x=20.10 x=200/8 x=25 2)25/x=15/9 25.9=x.15 X.15/=25.9 X=225/15 X=15 3)x/21=12/28 X.28=21.12 X=252/28 X=9