Question

NEED HELP ASAP!!! The work of a student to solve the equation 2(4x − 4) = 8 + 4x + 4 is shown below: Step 1. 2(4x − 4) = 8 + 4x + 4 Step 2. 6x − 6 = 12 + 4x Step 3. 6x − 4x = 12 + 6 Step 4. 2x = 18 Step 5. x = 9 In which step did the student first make an error and what is the correct step?

Step 2, 8x − 6 = 2(6 + 2x + 2)
Step 2, 8x − 8 = 12 + 4x
Step 3, 6x − 4x = 12 − 6
Step 3, 6x + 4x = 12 + 6

Answer 1

I took questions like these and they are miserable. The student first made a mistake in Step 2. He added 2 and 4 instead of multiplying it. The correct answer is Step 2, 2, 8x − 8 = 12 + 4x.