9514 1404 393
Answer:
x = 7
Step-by-step explanation:
The angle bisector divides the sides proportionally.
(2x -4)/8 = 15/(20 -8)
3(2x -4) = 2(15) . . . . . . . . multiply by 24
2x -4 = 10 . . . . . . . . . divide by 3
x -2 = 5 . . . . . . . . divide by 2
x = 7 . . . . . . . add 2
