Question

Which expressions are equivalent to this expression?

Answer 1

We will start by expanding (or multiplying through) with 3(n+4)

We get:
3n + 12
3n can be expanded to equal 2n+n, so the correct answer will be
2n + 12 + n

Simply add the options together and see what one matches 3n + 12

2n + 12 + n = 3n + 12, which in turn equals 3(n+4)

ANSWER: 2n + 12 + n