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

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