Which expression is NOT equivalent to the other three?

-9 - 7n + 16n

9 (n - 9)

n - 9 + 8n

9n - 9

9 (n - 9) = 9n - 81

Step-by-step explanation:

Equivalent expressions are expressions which are equal. To determine if expressions are equivalent, simplify to lowest terms through combining like terms.

-9 - 7n + 16n = - 9 + 9n

9 (n - 9) = 9n - 81

n - 9 + 8n = - 9 + 9n

9n - 9 = - 9 + 9n