Hideki found the solution for the equation below to be r = 66. 6(5 + r) = 96 What mistake did Hideki make in solving the equation? What is the correct solution? A. He did not distribute 6 to r; r = 11. B. He did not divide both sides by 6; r = 16. C. He did not multiply both sides by 6; r = 571. D. He did not subtract 5 from both sides; r = 15. Amanda is 15 years old. She has two sisters, Britney, who is 12 years old, and Caitlin, who is the youngest. Amanda's age is equal to 3 times the difference of Britney's age and Caitlin's age. How old is Caitlin? A. 3 years old B. 5 years old C. 7 years old D. 12 years old