Why This happen?

Question

Why when you take any number
after that double it by two
and then plus 100
after that divide by two
and then minus back the number that you think
you will get the answer 50.

Explain through this equation.
(A x B + C )/B - A= C/B

the sign "/" means divide.

Answer 1

C/B means C/2 is the answer always. The number added is halved in the process and the answer is half the number.

The original number A is first doubled and then halved and the same number is subtracted gives zero.

[A*2 / 2] - A = zero.

Therefore the answer is C/2 always.

Answer 2

It's simple basic arithmetic. Forget the 100 you add for now.

What you are doing is taking a number, say 4, then double it to 8, then dividing it by 2 (i.e taking away the 4 you added when doubling it) = 4, and then taking away the 4 = 0

All you are doing is doubling a number and then taken it away again, so it always comes back to 0.

All that leaves is the 100, the only thing you are doing to the 100 is dividing by 2 = 50.

Answer 3

Let the number be x.

(2x + 100) / 2 - x = 2 ( x + 50 ) / 2 - x
= x + 50 - x
= 50

Answer 4

(2X + 100)/ 2 is just X + 50 (where X is the number you think of). So obviously (X +50) - X is 50. Pretty straightforward.

Answer 5

all your doing is addin a numberm then add 100 then divide it (which obviously half of 100 is 50) then jus takin your number back. Looks complicated but isnt!

Answer 6

Let the number be x.

(2x + 100) / 2 - x
= x + 50 - x
= 50 (QED)

Answer 7

x*2+100/2-x=50 x=700
700*2+100/2-700=50
1400+100/2-700=50
1500/2-700=50
750-700=50

it's math!

Answer 8

I not sure, but i'd love to know how to double anything by more than 2 , you could treble it!:-)

Answer 9

The answer is in the question itself.

Answer 10

(2n + 100) / 2 - n . . . . . . . this expression will always result to 50
whatever the value of n