5n + 3 is probably what you want. It could possibly be 5 (n+3) depending on where you pause when you say it.
x+9x
If you call your number x, the expression would be 5x.
The algebraic expression for 11 minus the product of 5 and a number can be written as 11 - 5x, where 'x' represents the unknown number.
2x+3
2x+15
x+6
16n
10n
x+9x
the product of 23 and a number
If you call your number x, the expression would be 5x.
v + 6
7E
2b=c
The algebraic expression for 11 minus the product of 5 and a number can be written as 11 - 5x, where 'x' represents the unknown number.
5+4x
2x+15