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

7x − one over two (8x + 4) = 6

step 1: 7x − 4x − 2 = 6
step 2: 3x − 2 = 6
step 3: 3x − 2 + 2 = 6
step 4: 3x = 6
step 5: x = 2

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 added only to one side of the equation

no error was made