Jackson collected s seashell.
Petra and Jesus collecte 2s-13 seasheel.
Thus total seasheel they collected is s+2s-13+2s-13=5s-26
A/q,
5s-26=94
5s=120
s=24
Rounding off we have, s=24.
Thus Jackson collected 25 sea shell.
Petra and Jesus collected 2x24-13=35
Thus Petra and Jesus collected 35 each shell.
The answer is Jackson collected 24 seashells. Petra and Jesus collected 35 seashells each.