Show work please for number 2

The combined distance between CD and DE is CE, so...
2x+4 + 6 = x+14 Simplify like terms..
2x + 10 = x + 14 Subtract x from both sides..
x + 10 = 14 Subtract 10 from both sides...
Proof: 2 (4) + 4 + 6 = 4 + 14
8 + 10 = 18
Check