Answer
UW = 10
Step-by-step explanation
From the image attached, we can see that
UV + VW = UW
But
UV = 2x + 3
VW = 7
UW = x + 10
UV + VW = UW
(2x + 3) + 7 = x + 10
2x + 3 + 7 = x + 10
2x + 10 = x + 10
2x - x = 10 - 10
x = 0
UW = UV + VW
UW = 2x + 3 + 7
UW = 2 (0) + 10
UW = 0 + 10
UW = 10
Hope this Helps!!!