Răspuns :
{ X, Y } i.p { 2, 5 }
X x 2 = Y x 5 = k
X x 2 = k ⇒ X = k/2
Y x 5 = k ⇒ Y = k/5
X + Y = 7
5) 2)
k/2 + k/5 = 7
5k/10 + 2k/10 = 7
7k/10 = 7
7k = 70
k = 10
x = 10/2 = 5
y = 10/5 = 2
X x 2 = Y x 5 = k
X x 2 = k ⇒ X = k/2
Y x 5 = k ⇒ Y = k/5
X + Y = 7
5) 2)
k/2 + k/5 = 7
5k/10 + 2k/10 = 7
7k/10 = 7
7k = 70
k = 10
x = 10/2 = 5
y = 10/5 = 2