Răspunsuri

2014-09-20T11:35:59+03:00

dacă x/y = 2/3 ⇒ 5x/y = 10/3

y = 3x/2     (2x+y)/(x-y) = (2x +3x/2) / (x-3x/2) = (7x/2) / (- x/2) = - 7



2 5 2