human
There are 235 books in a library. On Tuesday, 227 books are taken out. On Thursday, 56 books are brought back and 35 books are taken out again on Friday. How many books are there now?
assistant
How many books were left after Tuesday? ** On Tuesday, 227 books were taken, so there are 235 - 227= <<235-227=8>>8 books left.
How many books are there now? ** 56 books were brought back on Thursday, so there are 8 + 56 = <<8+56=64>>64 books in the library.
How many books are there now? ** Finally, 35 books are taken out on Friday, leaving 64 - 35 = <<29=29>>29 books available.
#### 29