Question

The square root of 5 less than twice a number is 7. find the number

Answer 1

27

Explanation:

Let the number to find out be 'x'

Therefore,

according to the condition given question, we get the equation as

`√(2x-5)=7`

Now,

squaring both the sides, we get

2x - 5 = 49

on adding 5 both sides, we get

2x - 5 + 5 = 49 + 5

or

2x = 54

or

x =
`\frac{\textup{54}}{\textup{2}}`

or

x = 27

Hence, the number is 27