In order to determine the total number of pages Jackie read, we would have to determine the number of pages she read each day and add these pages together
Number of pages she read on Monday = x 252 = 126 pages
Number of pages she read on Tuesday = 28 pages
Number of pages she read on Wednesday = x 252 = 63 pages
The total number of pages she has read so far = 126 + 28 + 63 = 217 pages