Prove that in the set of the equations
all possible solutions contain value a as an answer
for one of the uknowns.
(In reply to Sollution
by Kenny M)
2 friendly remarks:
1st: SOLLUTION - one L is redundant.
2nd: once you edit more than "one time modification " only - you are free on the n-th time erase all the n-1 previous remarks
e.g. Edited on October 24, 2017, 5:07 pm-
USE THIS OPTION IN YOUR FUTURE POSTS!!