Answer:
UV = 12
Explanation:
SV = ST + TU + UV ( substitute values )
4x - 29 = 13 + 6 + 2x - 18
4x - 29 = 1 + 2x ( subtract 2x from both sides )
2x - 29 = 1 ( add 29 to both sides )
2x = 30 ( divide both sides by 2 )
x = 15
Then
UV = 2x - 18 = 2(15) - 18 = 30 - 18 = 12