The answer would be 4X okay
Given:
The expression is:

To find:
The terms and like terms in the expression.
Solution:
Terms: Variables, constants and product of variable and constants are known as terms which are separated by addition sign "+".
Like terms: The terms which contain same variables with same power are known as like terms.
The given expression is:

It can be rewritten as:

Terms are
.
Like terms are
and
and
.
I got u.
-4n + 9 = -4n + 9