18
7
4X-3
It is 3*abs(n - 6) + 4*n
The expression would be abs(4n - 3n) where (4n - 3n) could be simplified to 1n or n. When n is positive, the result is n when n is negative, the result is -n (which will be positive).
The difference between three times a number and one is two times the number.
7/ 3/
18
23
twice the difference of three times a number and eight
7
12 and 28
33x
|3n - 27|
15
14
4X-3