Question

A number increased by five is negative fifteen. What is the number?

Answer 1

The value of the number is: n = -20

Explanation:

Given

A number increased by five is negative fifteen.

To determine

What is the number?

Let 'n' be the unknown number.

''A number increased by five'' means we have to add 5 to the number.

i.e.

n+5

Also, it is stated that a number increased by five is negative fifteen.

Thus,

• 
  `n+5=-15`

solving for n

`n+5=-15`

Subtract 5 from both sides

`n+5-5=-15-5`

Simplify

`n=-20`

Therefore, the value of the number is: n = -20