"Triple J, Y2K"

This is a cross-number puzzle. You need to place a digit (0-9) in each cell, so that the labelled numbers (read across & down like a crossword) satisfy the given equations. By convention, numbers never start with the digit '0'.

  X↓ Y↓   Z↓  
A →           X = 3J
B →           Y = 2K
 
C →         X + Y = Z
  A + B = C
J →      
K →       J + Z = C