The key is to recognize that the statements are identical:Vincen wrote:Does x = y?
(1) 4x - 2y = 80
(2) x = (40 + y)/2
The OA is the option E.
Using both equations, cannot find the correct answer? Experts, I would be thankful for your explanation.
Statement 2: x = (40 + y)/2
Multiply both sides by 4:
4x = 2(40 + y)
4x = 80 + 2y
4x - 2y = 80
Clearly, neither statement alone is sufficient, so if the statements are identical, the answer must be E
(If it doesn't feel intuitive that neither statement alone is sufficient, consider cases, If x = y, then we'd have 4x -2x =80 --> 2x = 80 --> x =. 40. So it could be the case that x = 40 and y = 40, giving us a YES. But it could also be the case that x = 20 and y = 0, giving us a NO.)
