SOLUTION: please help to construct a formal proof of validity 1.p>q /.'.(q.r)>p

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Question 640743: please help to construct a formal proof of validity
1.p>q /.'.(q.r)>p
Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!

if p then q therefore if q and r then p
p>q .'. (q.r)>p
answer is r