The number is -12.
Let the number we are to determine be represented by a
This equation can be determined from the question: 1/4a = 9 + a
In order to determine the value of a, take the following steps
Combine similar terms :
1/4a - a = 9
Add similar terms
-3/4a = 9
divide both sides of the equation by -4/3
a = -12
To learn more about division, please check: https://brainly.com/question/13281206
