Answer:
Option C, 5
Explanation:
Step 1: Make an expression
Negative five is subtracted from a number the result is 10
n - (-5) = 10
Step 2: Combine
n - (-5) = 10
n + 5 = 10
Step 2: Subtract 5 from both sides
b + 5 - 5 = 10 - 5
n = 5
Answer: Option C, 5