Can someone check this multiple choice question from my homework please?

1. An equation and the steps to solve it are shown below:
2x - 1/4 of (12x +4) = 3

Step 1: 2x + 3x + 1 = 3
Step 2: 5x + 1 =3
Step 3: 5x + 1 - 1 = 3 - 1
Step 4: 5x = 2
In which step made the error and why?
A) Step 1, because incorrect signs have been used.
B) Step 2, because the terms have been added incorrectly.
C) Step 3, because a number has been subtracted from both sides of the equation.
D) No error was made.
I chose A. If I'm wrong can you tell me why?

Question

Can someone check this multiple choice question from my homework please? 

1. An equation and the steps to solve it are shown below:
2x - 1/4 of (12x +4) = 3

Step 1: 2x + 3x + 1 = 3
Step 2: 5x + 1 =3
Step 3: 5x + 1 - 1 = 3 - 1
Step 4: 5x = 2
In which step made the error and why? 
A) Step 1, because incorrect signs have been used.
B) Step 2, because the terms have been added incorrectly.
C) Step 3, because a number has been subtracted from both sides of the equation.
D) No error was made. 
I chose A. If I'm wrong can you tell me why?

anonymous · Answer

A is right
this is a really dumb question, but A is correct
the minus sign was ignored

anonymous · Answer

ok...