This task has students sort through 8 scenarios matching all equations that accurately represent a particular scenario. I do not tell students this but there is more than one equation to represent all of the 8 scenarios (I typically just tell students that there could be more than one).
This activity is a great opener to one-step equations and gets students thinking about how to model scenarios in various way. It also gets students to connect an equation that models a scenario to the equation used to solve for a given variable.
Once students are used to this you can build and do similar activities with two step equations which provides more variety for equivalent expressions.