YES

Problem:
 +(-(x,y),z) -> -(+(x,z),y)
 -(+(x,y),y) -> x

Proof:
 DP Processor:
  DPs:
   +#(-(x,y),z) -> +#(x,z)
   +#(-(x,y),z) -> -#(+(x,z),y)
  TRS:
   +(-(x,y),z) -> -(+(x,z),y)
   -(+(x,y),y) -> x
  CDG Processor:
   DPs:
    +#(-(x,y),z) -> +#(x,z)
    +#(-(x,y),z) -> -#(+(x,z),y)
   TRS:
    +(-(x,y),z) -> -(+(x,z),y)
    -(+(x,y),y) -> x
   graph:
    
   Qed