Respuesta :
Answer:
The numerical length of SU =
5 units
Step-by-step explanation:
Here, we want to get the length of point SU
mathematically;
SU = ST + TU
4x + 1 = 3x -1 + 3x
4x + 1 = 6x - 1
6x-4x = 1 + 1
2x = 2
x =2/2 = 1
But SU = 4x + 1 = 4(1) + 1 = 5 units