An equation and the steps to solve it are shown below:

2x − one over four (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 was the error made and why?

Step 1, because incorrect signs have been used
Step 2, because the terms have been added incorrectly
Step 3, because a number has been subtracted from both sides of the equation
No error was made