Answer:
7(x + 9)
Step-by-step explanation:
To factor this algebraic expression, you must take out the GCF (Greatest Common Factor) that 7x and 63 both have.
In this case, the GCF is 7, because 7x can be divided by it (giving you x), and so can 63 (giving you 9).
7x + 63 =
7(x + 9)
