Question

9/25 : 4х/5 = 21/20 : 63/100
Подскажите, как решить.

Answer 1

9/25 : 4х/5 = 21/20 : 63/100  

9/25 : 4х/5 = 9х/20  

21/20 : 63/100 = 15/9 = 5/3  

9х/20 = 5/3  

9х • 3 = 5 • 20  

27х = 100  

Х = 100/27 = 3 19/27