Hi there, I am trying to complete a grammar exercise online whereby you have to choose between the articles à and de. "Ce brevet est l’équivalent du/au système d’apprentissage mais il n’équivaut pas du/au système d’apprentissage". Having searched WR, I am told that both équivalent and équivaloir take à after them; however, if this is the case, then the sentence does not make sense. Or perhaps I have misunderstand the meaning of équivalent and équivaloir. Could anyone shed some light on this situation please? Many thanks.