Write an algebraic expression for the quantity. Let x represent the unknown value. Seven times a quantity decreased by thirteen

what is 7x-13

28

To find an algebraic expression for the quantity, we need to break down the given information.

First, we will represent the unknown value as "x."

Next, we have the phrase "a quantity." Since the question does not provide any specific quantity, we will use "y" to represent the unknown quantity.

Lastly, the phrase "decreased by thirteen" implies the subtraction of thirteen from the quantity. Therefore, we need to subtract thirteen from "y."

Putting it all together, the algebraic expression for the given information is:

7(y - 13)