Kate solved an equation incorrectly, as shown below: step 1: 9x = 72 step 2: x = 72 − 9 step 3: x = 63 which statement best explains why step 2 is incorrect in kate's solution? a. she did not multiply 72 nine times. b. she did not multiply 72 by 9. c. she did not add 9 to 72. d. she did not divide 72 by 9.