Give an example of an open equation.

An example of an open equation is: x + 5 = 10.

Pizza costs $1.50 per slice. Use a table and an equation to represent the relationship between the number of slices of pizza bought and the total cost.

An example of an open equation is: 2x + 3 = 7y.

An open equation is an algebraic equation that contains one or more variables and does not have a specific solution. Here's an example of an open equation:

x + 3 = 7

In this equation, the variable "x" is present, but it has no assigned value. Therefore, we cannot determine a concrete solution for this equation without additional information. It remains an open equation until the value of "x" is specified, at which point it becomes a closed equation with a unique solution.