#1**+1 **

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!

hugomimihu Sep 23, 2020