Question

alguem me ajuda pls​

Answer 1

20:25=3:x
20x=700
X=700:20
X=35


20:40=28:y
20y=1120
y=1120:20=56


Ex2
A)2:4=3:x
2x=12
X=12:2=6
B)4:12=x:21
12x=84
X=84:12=7
C)x:9=8:12
12x=72
X=72:12=6