Step 1: -4(x-7)+1≤-3
Step 2: -4(x-7) ≤-4
Step 3: -4x+28 <-4
Step 4: -4.x <-32
Step 5: x<8
Between which two consecutive steps did Christopher make a mistake?
Step 4 and Step 5
Step 3 and Step 4
Step 1 and Step 2
Step 2 and Step 3