Study=Fail..[Proved !!!]
(Eq.1)------: Study=Dont Fail.

(Eq.2):----- Dont Study=Fail.

........Adding Eq 1&2......

Study+Dont Study=Fail+Dont Fail.

.......Taking Common.......

Study(1+Dont)=Fail(1+Dont).

.....Cut "(1+Dont)" On Both Side.

Solution:

Study=Fail.

HENCE PROVED...