Answer:
a(-3b + 3cb - 7)
Explanation:
In order simplify the expression 4ab + 3acb - 7ab - 7a, first, let's combine the like terms:
Combine like terms with 'ab':

Now, the expression becomes:

Next, factorize the expression:
Factor out the common term 'a' from the remaining terms and keep the remaining terms in bracket.
a(-3b + 3cb - 7)
The simplified and factorized expression is: a(-3b + 3cb - 7)