Question

If 1\2 is subtracted by a no. and the difference is multiplied by 4 the result is 5. what is the no.

Answer 1

3

Explanation:

4 (x-1/2) = 5

4× - 2 = 5

4x = 5+2

x = 7/4

Answer 2

If
`(1)/(2)` is subtracted by a no. and the difference is multiplied by 4 the result is 5 number is
`(-3)/(4)`

Solution:

Let’s assume the required number is x.

Given that
`(1)/(2)` is subtracted by “x”

On subtracting
`(1)/(2)` by given number we get (
`(1)/(2)`) – x

Given that the difference is multiplied by 4

Now multiply the above difference by four,

4 ( (
`(1)/(2)`) – x )

On simplification, we get

= 2 – 4x

Given that above expression is equal to 5.

So 2 – 4x = 5

-4x = 5 – 2 = 3

x =
`(-3)/(4)`

Hence required number is
`(-3)/(4)`