Question

please let me know the answer

Answer 1

AD/DB =AE/EC
4/X-4 = 8/ 3x-19
$4 \div 4 - x \: = 8 \div 3x - 19$

Answer 2

$\frac{ad}{db} = \frac{ae}{ec} \\ \frac{4}{8} = \frac{x - 4}{3x - 19} \\ 4(3x - 19) = 8(x - 4) \\ 12x - 76 = 8x - 32 \\ 12x - 8x = - 32 + 76 \\ 4x = 44 \\ x \: = 11 unit$
your solution friend....