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padre : 3x 3x +2 3x+15
hija : x x+2 x +15
3x+15=2(x+15)
3x+15=2x+30
x=15
padre: 3x +2 hija: x+2
3(15)+2 15+2
47 17
Edad de la hija = y
PLANTEO DE LAS ECUACIONES.
(1) x-2 =3(y-2)----- x-2 = 3y-6 --- x-3y = -6+2 --- x-3y= -4
(2) x+13 = 2(y+13) ---- x+13 = 2y+26 --- x-2y = 26-13 -- x-2y = 13
x-3y= -4 (-1)
x-2y = 13 (1)
-x+3y= 4
x-2y = 13
-------------
y =17
x-2y = 13
x = 13+2y = 13 + (2*17) = 13+34 = 47
Edad del padre = x = 47 años
Edad de la hija = y = 17 años