Discussion
What is the value of x − y?
(1) x + y = 3y − x
(2) x + y = x3 + y3
| (A) | if statement (1) ALONE is sufficient to answer the question but statement (2) alone is not sufficient; |
| (B) | ... |
| (C) | ... |
| (D) | ... |
| (E) | ... |
| (F) | ... |
The solution is
Posted: 09/30/2013 14:05
I don't understand why A is correct
Posted: 10/04/2013 17:52
A H, have you followed the explanation?
Posted: 11/07/2013 22:47
x+y=3y-x transformed as x+y-3y+x=0 then we can get 2(x-y)=0 so x-y=0. A is correct.
Posted: 11/07/2013 22:50
When u got the statement(1) is right, u can eliminate BCE, then it's easy to figure out the answer.
Posted: 04/04/2014 08:29
I don't know why (2) is wrong what if x=-1,y=-1
Posted: 04/21/2014 14:16
Zoe Chen, there are different pairs of numbers which satisfy (2) yet yield different values for x − y
Posted: 04/09/2014 11:11
Even D could have been an option, as we can create (x-y)3⃣
Posted: 04/21/2014 14:18
Amit, please show us more.