With M and X unknown and the following formules and datas I have to find the molecular weigth of M and X.

2MXO_{3} = 3O_{2}+ 2MX

2.451g 0.9600g 1.491g

2MX + 2AgNO_{3} = 2AgX + 2MNO_{3}

2.869g

I know that the quantity which I begin in the second formula is 1.491(the same that the final of the first formula), but I can't find another data for work. I tried to found the quantity of Ag, but I don't Know the total mol .A hint please