Given: x represent the number. A number decreased by the sum of the number and one.
Required: The algebraic expression for the english phrase and its simplification.
Explanation:
Given that x is the number.
Sum of the number and one = (x + 1)
Now, the number is decreased by the sum of the number and one.
So, the algebraic expression is

Simplifyung further,

Final Answer: The algebraic expression is x-(x+1) and after simplification, it is -1.