To find the original cost of the groceries Nick bought, we can set up the equation based on the information given:
Nick bought groceries for \( n \) dollars and had a coupon for $15.50 off, meaning he paid \( n - 15.50 \) dollars. We know that this amount equals $34.63 (the amount he actually paid).
Therefore, we can formulate the equation:
\[ n - 15.50 = 34.63 \]
Now, to find \( n \), we can rearrange the equation:
\[ n = 34.63 + 15.50 \]
Calculating that gives:
\[ n = 50.13 \]
So the equation that represents the original cost of the groceries Nick bought is:
\[ n - 15.50 = 34.63 \]
And the original cost of the groceries Nick bought was $50.13.
Thus, the correct response is:
n − 15.50 = 34.63; the original cost of the groceries Nick bought was $50.13.