Respuesta :

check the picture below

notice, the angles have, each a right-angle and they also share the angle on the upper-right-corner, thus, similar by AA

solve for "x"
Ver imagen jdoe0001
mreijepatmat
triangles DAB & DEC ARE similar, then we can write

DA/DE = AB/EC ==>(8 +EA)/8 = 6/4
AND EA = 4