Respuestas

2012-03-21T12:13:11+01:00

((x-3)/(y-3)=1/3      3x-9=y-3     3x-y=6  (-3) -9x+3y=-18

(x+1)/(y+1)=3/5)   {5x+5=3y+3    5x-3y=-2        5x-3y=-2

                                                                      -4x    =-20   x=5años   y=9años