Respuesta :
R is the mid point of qs it means
qr = rs
and qs = qr + rs
it seems s is the mid point of rt it means rs = st and
rt = rs+st
putting the values of rt, rs and st and solve for x
8x-43 = 2x -4 + 4x-1
8x-4x-2x = 43-5
2x = 38
x = 19
Now
rs = 2x-4 = 2 x 19 -4 = 38 - 4 = 34 = qr
and qs = rs + qr
= 34 + 34 = 68
Answer: for a quick, short answer, QS=68
Step-by-step explanation:
