The problem asks us to factor the expression $8x + 56 - ax - 7a$.

1. Problem Description

The problem asks us to factor the expression $8x + 56 - ax - 7a$.

2. Solution Steps

We can factor the given expression by grouping.

$8x + 56 - ax - 7a$

Group the first two terms and the last two terms:

$(8x + 56) + (-ax - 7a)$

Factor out $8$ from the first group and $-a$ from the second group:

$8(x + 7) - a(x + 7)$

Now we have a common factor of $(x+7)$ in both terms, so we can factor that out:

$(x + 7)(8 - a)$

3. Final Answer

$(x+7)(8-a)$