As an algebraic expression this is written 2x - 12, where x is the unknown number.
3x - 3
4<x
a - 4
Remember,an expression is a problem without an answer.If it's a 4 less than a number,it should be 4<x.Hope this helps your problems!
It is: x-5
It could be: 32-x
n-9
n-3
5-w=
x - 11
32 - n/2