Let \( h \) represent the number of hamburgers sold and \( c \) represent the number of cheeseburgers sold.
We have the following two equations based on the problem statement:
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The total number of hamburgers and cheeseburgers sold is 437: \[ h + c = 437 \]
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There were 63 fewer cheeseburgers sold than hamburgers: \[ c = h - 63 \]
Now, we can substitute the expression for \( c \) from the second equation into the first equation:
\[ h + (h - 63) = 437 \]
Simplifying this, we combine like terms:
\[ 2h - 63 = 437 \]
Next, we add 63 to both sides to isolate the term with \( h \):
\[ 2h = 437 + 63 \] \[ 2h = 500 \]
Now, we divide both sides by 2 to solve for \( h \):
\[ h = \frac{500}{2} = 250 \]
Thus, the number of hamburgers sold on Wednesday is \( h = 250 \).
We can double-check our solution by calculating the number of cheeseburgers sold:
Using the second equation \( c = h - 63 \): \[ c = 250 - 63 = 187 \]
Now, let’s verify that the totals match: \[ h + c = 250 + 187 = 437 \]
This is true, confirming our solution is correct. Therefore, the number of hamburgers sold on Wednesday is
\[ \boxed{250} \]