Would the answer be c? ? the steps below show the incomplete solution to find the value of x for the equation 7x − 3x − 4 = −1 + 21: step 1: 7x − 3x − 4 = −1 + 21 step 2: 7x − 3x − 4 = 20 step 3: 4x − 4 = 20 which of these is most likely the next step? (4 points) select one: a. 4x = 24 b. 4x = 16 c. 4x = 5 d. 4x = 80