silly one from ..nova

**bohemian** · 07-19-2006, 09:58 PM

Question...................................

given x= 2y + 3
6y = 3x - 9
compare
A: x
B: y

The answer in nova suggests that D

But I am having the delusion of A

Help me down here pal.

**mishu007** · 07-20-2006, 02:44 AM

x= 2y + 3---(i)
another.....
6y = 3x - 9
=>6y=3(x-3)
=>2y=x-3
=>x=2y + 3
so both equations are same you cant determine the value of x,y as there are two unknown x,y variable..
So its D

**rainth** · 07-20-2006, 08:22 AM

Yah got it now
I was having another kinda problem.
Thanx.

**simba** · 07-20-2006, 08:37 AM

hmm simple one, no need to calculate nything, cn find out by looking at the question tht therz is only 1equation..
BTW if its given tht x,y are +ve numbers then it wld have been A.

**Mystery Man** · 07-20-2006, 10:54 AM

The equations are same. Answer is D

**longatum** · 07-20-2006, 01:13 PM

never mind...

**manasi1** · 07-20-2006, 02:47 PM

guys i did it this way. tell me if it is wrong. column a is x. x = 2y+3 given. so i just compared 2y+ 3 to y and it came D

**mishu007** · 07-20-2006, 03:51 PM

Originally Posted by manasi1

guys i did it this way. tell me if it is wrong. column a is x. x = 2y+3 given. so i just compared 2y+ 3 to y and it came D

it can be done because two given equations are equal.. if they are not equal you cant do that........

**bohemian** · 07-20-2006, 06:04 PM

I got u dude. Many many thanx.

but sometimes we can
If the problem was stated like t his..........
x = y + 3
2x - 2 = 2y + 4

Compare
A: x
B: y

There we can decide. A

I was misguided by this illusion on the previously stated problem.
Where the value y= -3 helped m,e out of the maze.

Take care