if the number queenie ate is q and the number champ ate is c
then q + c = 13 (together they ate 13)
and 1+2q = c (champ ate 1 more than 2x what queenie ate)
we know c is 1+2q so you can put that in the other equation where c goes
q+c = 13 turns to q+ 1+2q = 13
solve that for q:
3q +1 = 13
3q = 12
q = 4
Queenie ate 4 treats
