Sam solved the proportion
3 = 5, but she has some mistakes in her solution.
Read her steps carefully, and then answer the questions.

Step 1: (x + 5)1 = 4(x + 2)
Step 2: x + 5 = 4x + 8
Step 3: 5 = 3x + 8
Step 4:
3= 3x
Step 5: -1=1
Mill
Part A: In which step did Sam make her first mistake?
Part B: What is Sam's first mistake?
Select one answer for Part A, and select one answer for Part B.​