You can generate unlimited number of equations by a single click on a button. Choose a Main Topic to Create Custom Math Worksheets. It is not possible to predict how quickly you will develop confidence solving equations of a particular type but typically the examples will increase in difficulty very slightly each time you press the Next button.
Worlds simplest browser-based random matrix generator.
You can just try it with the default values or play with the values and re-create the worksheet. To make an arithmetic worksheet select values for the options shown and click the CREATE button. So rewrite the equation for B as Pr0. The app Equation Generator can create a set of questions with answers - at random.