Răspuns :
x / y = 2 / 3 , ( 2x + y ) / x
------------------------------------------
x / 2 = y / 3 = K
x / 2 = K => x = 2 K
y / 3 = K => y = 3 K
⇒ ( 2 · 2 K + 3 K ) / 2 K =
= ( 4 K + 3 K ) / 2 K
= 7 K / 2 K
= 7 / 2
x/y = 2/3 = > x/2 = y/3 = k
x/2 = k => x = 2k
y/3 = k => y = 3k
(2x + y)/x =
= (2·2k + 3k)/2k
= (4k + 3k)/2k
= 7k/2k
= 7/2