X+y+z=t simple.. there are no other numbers that we have to follow like (1/2x or 3/4y) so it is just all together=t. the x, y, z will equal t because t is the total number of students taking three languages. And that number should be equivalent to x,y,z combined.
True because it possible in anyway to get 6 and 1 if you roll a dice they not saying two of them they just saying 1 number cube so its a big chance that you can get 1 and 6
