There are 381 pages in Elliot’s book.  He has already read 149 pages.  If he reads 20 pages a day for a week, how many pages are still left to be read?
In a week, Elliot will read 20 x 7 = <<20*7=140>>140 pages.
Adding the prior readings, he has read a total of 149 + 140 = <<149+140=289>>289 pages.
There are 381 - 289 = <<381-289=92>>92 pages still left to be read.
#### 92