+1008 CE = AC = 10x+18.
DE = 7x - 1
CD = 10x + 18 - (7x -1) = 3x +19
We don't actually need that, though.
Or we do:
3x + 19 = 7x - 1 since D is the midpoint of CE, so CD = DE
20 = 4x
x = 5
Now
BC = 9x-2
10x+18 - (9x-2) = x + 20
AB = x+20
x = 5
AB = 25
BC = 43
CD = 34
DE = 34
25 + 43 = 34+34 = 68 = 68!
