11. Five mark exercise problem I

In $\Delta ABC$, $D$ and $E$ are points on the sides $AB$ and $AC$ respectively such that $DE || BC$ if $AD = 8x - 7$, $DB = 5x - 3$, $AE = 4x - 3$ and $EC = 3x - 1$, find the value of $x$.

 

Answer:

 

The value of $x$ $=$  units