I need to find the length JK.
Since J is between H and K, then HJ + JK = HK.
That means 4x+7+5x-8=53.
Solving gets 9x-1 = 53, so 9x = 54, so x = 6.
That means the length of JK is 5*6-8 = 22.
You are very welcome!
:P
+1252 
