Question #24601

1 Answer
Dec 29, 2017

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 : 9x1--------(B)

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

7x+7 = 9x1
Bring like terms to either side of the equation.

So, 7+1 =9x7x
or, 8 = 2x
or x = 82 = 4