To express the total number of cupcakes Valeria can bake (y) in terms of the number of eggs she has (x), we can use the following equation:
\[ y = 6x \]
In this equation, \( y \) represents the total number of cupcakes, and \( x \) represents the number of eggs Valeria can find. Since each egg allows her to bake 6 cupcakes, multiplying the number of eggs by 6 gives the total number of cupcakes.