PLS HELP!!
A teacher received the following answer to a quiz question in which the student was asked to simplify the expression in Step 1:
Step 1: -3(x-14y) + 6(-3x - 5y)
Step 2: -3x+42y - 18x - 30y
Step 3: -3x+18x + 42y - 30y
Step 4: (-3x+18x) + (42y-30y)
Step 5: 15x+12y
Part A: Identify the step where the student made a mistake and explain the specific error that was made. Support your answer using the correct vocabulary.
Part B: How would you correct the mistake? Show all your work.
