I need help with this

Answer:
16
Step-by-step explanation:
because V is the midpoint of UW, UV=VW
so 2(UV)= UW
plugging in values to find x,
2(x+6)=9x-2
distribute 2
2x+12=9x-2
7x=14
x=2
finding UW
plug x=2 into 9x-2
UW=9(2)-2=18-2=16