Answer:
The answer to your question is SV = 32
Step-by-step explanation:
Data
T = mid point
ST = x + 4
TV = 2x - 8
SV = ?
Process
1.- If T is the mid point of SV, that means that the distance from ST to SV is the same.
ST = TV
2.- Substitution
x + 4 = 2x - 8
-Solve for x
x - 2x = -8 - 4
-Simplifying
-x = -12
-Result
x = 12
3.- Find the length of SV
SV = ST + TV
SV = x + 4 + 2x - 8
SV = 12 + 4 + 2(12) - 8
SV = 16 + 24 - 8
SV = 40 - 8
SV = 32
