Answer (1) if the statement can be solved by anyone of the statements but not the other one.
Answer (2) if question can be solved by using either of the two statements.
Answer (3) if the question can be solved by using both the statements together and not by any one of them.
Answer (4) if the question cannot be solved with the help of given data and more data is required.
Is $x=y?$
- $(x+y) (\frac{1}{x} + \frac{1}{y}) = 4$
- $(x-50)^2 = (y-50)^2$