A teacher asked her student to solve the equation 3(3x + 2) - 12 = 6x + 9 for x. The student's work is shown3(3x + 2) - 12 = 6x + 9Step 1: 9x + 6 - 12 = 6x + 9Step 2. 9x - 6 = 6x + 9Step 3. 3x - 6 = 9Step 4:3x = 15Step 5 x = 12In which step did the student make his first error? Explain the mistake
