Răspuns:
Explicație pas cu pas:
x/1/2 = y/1/3 = z/1/5
2x = 3y = 5z
2x = 5z
x = 5z/2 = 250z/100 = 250%z
__________
x = 3y/2
z = 3y/5
x - y + 2z = 34
3y/2 - y + 6y/5 = 34
15y/10 - 10y/10 + 12y/10 = 34
17y/10 = 34
y = 34*10/17 = 20
x = 3*20/2 = 30
z = 3*20/5 = 12