Answer:
A. 3x-4=5.
Step-by-step explanation:
We are given two statements
Statement 1:if x=3 then 3x-4=5.
Statement 2: x=3
Law of detachment: if two statements are given
Statement: if p , then q.
Statement 2: p
Then conclusion: q
Using law of detachment to draw a conclusion
by comparing given statements with the statements of law of detachment then we get
p:x=3
q: 3x-4=5
Conclusion: q
Conclusion: 3x-4=5
Hence, the conclusion is possible and conclusion is 3x-4=5.