Question

Which of the following expressions is equivalent to

20 - 3(x + 2)?
A:3x+14
B:- 3x + 14
C: -9x+42
D: 17x - 34

Answer 1

B:-3x+14

Explanation:

20-3(x+2).

20-3x-6.

-3x-6+20

-3x+14

Answer 2

Answer: B (-3x+14)

Explanation:

We need to solve 20-3(x+2)

Following PEMDAS firstly we'll do -3(x + 2) or (x + 2) times -3.

-3*x = -3x

-3*2 = -6

We now have 20 - 3x - 6. We can group like terms.

14 - 3x or -3x + 14.