9514 1404 393
Answer:
x = 8
Step-by-step explanation:
Corresponding segments are proportional.
2x/12 = (x+4)/9
18x = 12(x +4) . . . . . multiply by 9·12
6x = 48 . . . . . . . . . . subtract 12x
x = 8 . . . . . . . . . . . . divide by 6
