Problema Solution
The sum of three times a number is equal to the difference of the number and nine. Find the nuber
Answer provided by our tutors
This question appears incomplete because it references the 'sum' of something but only gives one part of the 'sum', (3n)--the question does not say what to add 3n to.
We will work this problem as though there is no sum. Therefore, we can write:
3n=n-9
simplifying, we get:
2n=-9
n=-4.5