Question 1042390
1. (PvQ)&R ------------------Hypothesis
2. (R&P)>S ------------------Hypothesis
3. (Q&R)>S ------------------Hypothesis
4. (P&R)v(Q&R) --------------Distributivity on #1
5. (R&P)v(Q&R) --------------Commutativity on #4
6. S   ----------------------Case Analysis based on #2, #3, and #5