Create an example of an open equation that uses the variable x and would require two or more steps to solve

Find percent notation for 0.008 0.008=

Suppose that the price p (in dollars) and the weekly sales x (in thousands of units) of a certain commodity satisfy the demand equation 4p cubedplusx squaredequals38 comma 400. determine the rate at which sales are changing at a time when xequals80, pequals20, and the price is falling at the rate of $.20 per week.

For the equations below which statement is true ? -2x=14 6x=-42