8563pages
He read 1333 pages
Subtract the pages he has read from the initial value to find the remainder of pages left:
8563 - 1333 = 7230 pages unread
(10+6) / 8+2-4=0
10 plus 6 equal 16, divided by 8 plus 2 minus 4 equal 0
The constant of proportionality is 9
The coordinates of F' is (-9 + 3, 2 - 8) = (-6, -6)