Найдите у:хесли 7,2:х=4:у

Question

Найдите у:хесли 7,2:х=4:у

Comments

7,2/х=4/у; 7,2у=4х; 7,2*(у/х)=4; у/х=4/7,2=40/72=5/9; у/х=5/9

Answer 1

7.2 / x = 4 / y
7.2y = 4x
x = 7.2/4 = 18
7.2y = 72
y = 10.
10/18 = 5/9