Răspuns :
a) x/y = 2/5 x/2 = y/5 = (x+y)/7 = 98/7 = 14 ⇒ x = 28 y = 70
b) x/y = 3/7 x/3 = y/7 = (x-y)/(-4) = -6 x = - 18 y = - 42
b) x/y = 3/7 x/3 = y/7 = (x-y)/(-4) = -6 x = - 18 y = - 42