An algebraic expression is a mathematical phrase that can contain numbers, variables, and operators.
To write "4 less than three sevenths" as an algebraic expression, we can use the variable x to represent the number we are trying to find, and then use subtraction and division to represent the parts of the phrase "4 less than three sevenths".
3/7x - 4 = an algebraic expression
or
x = 3/7y - 4
where x is the unknown value and y is any given value
Both expressions are algebraic representation of the statement "4 less than three sevenths"