Choose the missing step in the given solution to the inequality −x − 3 < 13 + 3x. −x − 3 < 13 + 3x−4x < 16 x > −4 select one: a. −4x − 3 > 13 b. 2x − 3 < 18 c. −4x − 3 < 13 d. 2x − 3 > 18

Your answer is C. -4x - 3 < 13. This is because the step after this then adds the 3 to get -4x < 16, and so the -4x was achieved by doing -x - 3x in the second step. I hope this helps! Let me know if you have any questions :)

Understanding what? lol