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 20 more photos than Claire. How many photos has Claire taken?  Choices:
A) 6
B) 8
C) 10
D) 12
E) 14
L = R   L = 310   R = 10 + 20   310 = 10 + 20   10 = 10   The answer is 10.
<result>C</result>
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 20 more photos than Claire. How many photos has Claire taken?