21+x
6+n
n + 10
(6+n) n= a number
divisor
the sum of a number and three
It is n + 14.
The algebraic expression for "4 less than the sum of a number and 5" is (n + 5) - 4, where n represents the unknown number.
Assuming the number is x, then: x + 9
x + 21
0.3333
You cannot write an algebraic expression for that, you need an equation. The equation is n - 6 = 4
The algebraic expression is n + 100, where n is the unknown number.