To solve the problem, let's break it down step-by-step using the information provided:
-
Amelina's Shoes: Let the number of pairs of shoes Amelina has be represented by \( s \).
-
Valerie's Shoes: Valerie has four less than three times the number of pairs of shoes that Amelina has. This can be written as: \[ V = 3s - 4 \] where \( V \) represents the number of pairs of shoes Valerie has.
-
Peter's Shoes: Peter has twice the number of pairs of shoes that Valerie has. Therefore, we express this as: \[ P = 2V \] Substituting the expression for \( V \) from above, we get: \[ P = 2(3s - 4) \]
Now, simplifying the expression for \( P \): \[ P = 2 \cdot 3s - 2 \cdot 4 \] \[ P = 6s - 8 \]
Thus, the algebraic expression that represents the number of pairs of shoes that Peter has is: \[ \boxed{6s - 8} \]