Help! Will give medal!

The steps below show the incomplete solution to find the value of n for the equation
4n - 2n + 4 = -1 + 17

Step 1: 4n - 2n + 4 = 16
Step 2: 4n - 2n + 4 = 16
Step 3: 2n + 4 = 16

Which of these is most likely the next step

A) 2n = 12
B) 2n = 4
C) 2n = 8
D) 2n = 20

I believe it is C but can someone double check?

Question

Help! Will give medal!


The steps below show the incomplete solution to find the value of n for the equation 
4n - 2n + 4 = -1 + 17

Step 1: 4n - 2n + 4 = 16
Step 2: 4n - 2n + 4 = 16
Step 3: 2n + 4 = 16

Which of these is most likely the next step

A) 2n = 12
B) 2n = 4
C) 2n = 8
D) 2n = 20

I believe it is C but can someone double check?

anonymous · Answer

You want 2n to be by itself on one side. to do that you need to move 4 to the other side. 
subtract 4 on both sides. 2n=12

kendricklamar2014 · Answer

Like @GretaKnows said:$$2n + 4-4 = 16 - 4$$
Which equals: $$2n = 12 ~(Choice ~ A)$$