9. Five mark example problem I

In \(\Delta ABC\), if \(DE || BC\), \(AD = x\), \(DB = x - 2\), \(AE = x + 2\), and \(EC = x - 1\), then find the lengths of the sides \(AB\) and \(AC\).

 

Answer:

 

The length of the side \(AB\) \(=\)  units