cum se imparte numarul 70in parti direct proportionale cu 5 si 3

Răspuns :

x + y = 70

x / 5 = y / 3 = k

x / 5 = k => x = 5 k

y / 3 = k => y = 3 k

4 k + 3 k = 70

7 k = 70

k = 70 / 7

k = 10

x = 5 × 10 = 50

y = 3 × 10 = 30