Question

Factoring the expression 21 + 7x, what is the result?

A. 7(3 + x)
B. 7(1 + 7x)
C. 21(1 + x)
D. 7(3 + 7x)

Answer 1

The expression 21 + 7x can be factored as 7(3 + x).

Step-by-step explanation:

The expression 21 + 7x can be factored by pulling out the greatest common factor, which is 7. This gives us 7(3 + x). Therefore, the correct answer is A. 7(3 + x).