1) Make an equation:
[tex]4x + x = 40[/tex]
Where x represents the unknown amount (the number of shells)
2) Solve for x
[tex]5x = 40[/tex]
Combine the x's
[tex]x = 8[/tex]
Divide 40 by 5 to get X alone
3) Answer:
Manny collected 32 seashells, while Cameron only collected 8