Duane gave Lana 42 / 2 = <<42/2=21>>21 pages.

After adding Duane’s, Lana has 21 + 8 = <<21+8=29>>29 pages in her binder.

# Answer

29
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Lana had 8 blank pages left in her binder, but she knew she would need more for her next class. Duane took half of the 42 pages in his binder out and gave them to her. How many pages does Lana have in her binder after adding Duane’s?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
29
Lana had 8 blank pages left in her binder, but she knew she would need more for her next class. Duane took half of the 42 pages in his binder out and gave them to her. How many pages does Lana have in her binder after adding Duane’s?
train