Question

What is n 3(–4n – 9) = 21

Answer 1

Answer: n= -4

Explanation:

1: Distribute: 3(-4n - 9)= 21 so, -12n - 27= 21

2: Add 27 on both sides: -12n - 27 = 21

+27 = +27

3: Level: -12n = 28

4: Divide both sides by the same factor: -12n = 48

------ = ----

-12 - 12

5: Level again: n = -4 because 48/(-12) is -4.

Answer 2

n=-4

Explanation:

3(-4n-9) = 21

_________ ____

3 3

-4n-9=7

-4n=16

__ __

-4n -4n

n= -4