As an algebraic expression it is: 2x-9
x - 8
x-5
A number is an expression. It is not an equation, or an inequality, since it doesn't have an equal sign, or an inequality (greater than, less than, etc.) sign.
Twelve. Four squared is sixteen less four is twelve.
6a-4
4x - 5
Let the number be x and so the expression is: 5x-4
4<x
An algebraic expression for "6 less than 5 and a number" is (5 - x - 6), where x represents the unknown number.
What is the algebraic expression for 5 less than a certain number
The algebraic expression for "4 less than the sum of a number and 5" is (n + 5) - 4, where n represents the unknown number.
3x-4
5-w=
x - 11
32 - n/2
n-9