Answer:
C
Step-by-step explanation:
Given that Z is the midpoint of RT, then
RZ = ZT, substitute values
4x - 28 = 24 ( add 28 to both sides )
4x = 52 ( divide both sides by 4 )
x = 13
RZ = 4x - 28 = (4 × 13) - 28 = 52 - 28 = 24
RT = RZ + ZT = 24 + 24 = 48