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.
