Answer:
RT = 24
Step-by-step explanation:
Since S is the midpoint of RT , then
ST = RS , that is
6x = 4x + 4 ( subtract 4x from both sides )
2x = 4 ( divide both sides by 2 )
x = 2
Then
RT = RS + ST = 4x + 4 + 6x = 10x + 4 , so
RT = 10(2) + 4 = 20 + 4 = 24