We will simplify each expression and compare them.
For the first expression,
- 9 - 7n + 16n = - 9 + 9n = 9n - 9
For the second expression,
9(n - 9) = 9n - 81
For the third expression,
n - 9 + 8n = n + 8n - 9 = 9n - n
For the fourth expression,
9n - 9
Thus, we can see that the expression that is not equvalent to the other three is
B) 9(n - 9)
