Question

Aflati numerele pozitive X si Y inverse proportionale cu 2 si 3 stiind ca X+Y=7,5

Answer 1

x / (1/2) = y / (1/3) = (x+y) / (1/2+1/3) = 7,5 / (5/6) = 75/10 * 6/5 =450/50=9

                  =>    x = 1/2 * 9 = 9/2 = 4,5  ;

                          y = 1/3 * 9 = 9/3 = 3  ;