Question

Three times the sum of a number and 15 is 24

Answer 1

The answer is -7 since your multiplying 3x the sum

Answer 2

`\huge\boxed{\sf x = -7}`

Explanation:

Let the number be x

So,

=> The sum of number and 15 is x + 15

=> Three times will be 3(x+15)

Given that it equals 24

So, the given condition is:

3(x+15) = 24

Resolving Parenthesis

3x + 45 = 24

Subtracting 45 to both sides

3x = 24 - 45

3x = -21

Dividing both sides by 3

x = -7