Question

Question #24601

Answer 1

The number is 4

Explanation:

Suppose the number is `x`
Then `7` times the number will be `7x`

Now add, `7` to `7x` = `7x+7`...............(A)

The question further states that (A) is equal to one less than `9` times the number. It can be expressed as : `9x-1`--------(B)

We know from the question, (A) and (B) are equal and it can be written in equation form as :

`7x+7` = `9x-1`
Bring like terms to either side of the equation.

So, `7+1` =`9x-7x`
or, `8` = `2x`
or `x` = `8/2` = `4`