<human>:  Every bedtime, Juwella reads a book. Three nights ago, she read 15 pages. Two nights ago she read twice that many pages, while last night she read 5 pages more than the previous night. She promised to read the remaining pages of the book tonight. If the book has 100 pages, how many pages will she read tonight?
<bot>: How many pages did Juwella read two nights ago? ** Juwella read 15 x 2 = <<15*2=30>>30 pages two nights ago.
How many pages did Juwella read last night? ** She read 30 + 5 = <<30+5=35>>35 pages last night.
How many pages did Juwella read for three nights? ** She read a total of 15 + 30 + 35 = <<15+30+35=80>>80 pages for three nights.
How many pages will Juwella read tonight? ** Thus, she needs to read 100 - 80 = <<100-80=20>>20 pages tonight to finish the book.
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