Which step is the first incorrect step in the solution shown below?

Solve: 7(x + 1) = 8x + 14

Step 1: 7x + 7 = 8x + 14
Step 2: -x + 7 = 14
Step 3: -x = 21
Step 4: x = -21

a. step 1
b. step 2
c. step 3
d. step 4