Lisa and Robert have taken the same number of photos on their school trip. Lisa has taken 3 times as many photos as Claire and Robert has taken 10 more photos than Claire. How many photos has Claire taken? Answers.
A) 5  B) 8  C) 11  D) 12  E) 14

Rationale: "l = r l = 3 c r = c + 10 3 c = c + 10 c = 5 the answer is a ."
Answer: A