Khan Academy on a Stick
Problema Verbal, Dos Bicicletas que se Cruzan
Problema verbal de álgebra que involucra a dos bicicletas cruzándose.
If the above player doesn't work, you can try this direct link.
Problema verbal de álgebra que involucra a dos bicicletas cruzándose.
If the above player doesn't work, you can try this direct link.