How to rescue the position of a Sprite with Libgdx

I can not redeem the position of a sprite. I want to redeem the position of just a sprite how do I?

public class Cubos extends Actor {
Sprite azul, verde, vermelho, amarelo, cinza;

public Cubos(){

    azul = new Sprite(new Texture(Gdx.files.internal("texture.png")), 160, 0, 96,96);
    verde = new Sprite(new Texture(Gdx.files.internal("texture.png")), 0, 192, 64,64);
    vermelho = new Sprite(new Texture(Gdx.files.internal("texture.png")), 160, 96, 96,96);
    amarelo = new Sprite(new Texture(Gdx.files.internal("texture.png")), 64, 0, 96,96);
    cinza = new Sprite(new Texture(Gdx.files.internal("texture.png")), 256, 0, 96,96);

        }

public void act(float delta){
    super.act(delta);

    //Quero saber a posição X do azul ou amarelo eu faço "azul.getX() e retorna 0"
} }

If I write for ex. azul.getX() returns "0.0" but if I write this.getX() returns a position X I do not know which color.