Infosys
Company
Numerical Ability
Number System
What is the value of x?
(1) |x + 2| = 2|x - 2|
(2) x > 2
Read Solution (Total 13)
-
- If we take mod value as positive
x+2=2(x-2)
=> x+2=2x-4
=> x=6
If we take mode value as negative then we will get x=2/3 which is less than 2; condition no. 2 is not satisfied,
so x will be 6 - 6 years agoHelpfull: Yes(8) No(0)
- |x+2|=2|x-2|
x+2= 2(x-2)
from this equation we are getting x=6
x+2=2{-(x-2)}
from this equation we are getting x=2/3
since x>2
therefore x=6 - 6 years agoHelpfull: Yes(3) No(1)
- x would be 6
LHS, 6+2=8
RHS 2(6-2)=8 - 6 years agoHelpfull: Yes(2) No(0)
- x-2=2(x-2), Since x>2
2x-x=6
x=6 - 6 years agoHelpfull: Yes(1) No(0)
- 6+2=2(6-2) so ans is 6
- 6 years agoHelpfull: Yes(1) No(0)
- take mod value as positive, now
+x+2=+2(x-2)
=> x+2=2x-4
=> x=6
If we take mode value as negative then x=2
So ans is 6 - 6 years agoHelpfull: Yes(1) No(0)
- x+2=2x-4
x=6 - 6 years agoHelpfull: Yes(1) No(0)
- 6+2=8, 2(6-2)=8
- 6 years agoHelpfull: Yes(0) No(0)
- X+2= 2x-4
X=6 - 6 years agoHelpfull: Yes(0) No(0)
- X=6 and x>2
Bcz x+2= 2x-4
2x-x=2+4
x=6
So |6+2|=|12-4|
8=8 - 6 years agoHelpfull: Yes(0) No(1)
- We take modulus as +ve
+(X+2)=+(2X-4)
X=6 - 6 years agoHelpfull: Yes(0) No(0)
- 5
x+2=2x-4 solving it we get x=5 - 6 years agoHelpfull: Yes(0) No(1)
- By taking square on both sides
x+2=4(x-2)
x+2=4x-8
10=3x
x=3 (appx) and according to give condition x>2
We cannot ignore bar on both sides like rest of you did - 6 years agoHelpfull: Yes(0) No(0)
Infosys Other Question