# Another use of solver

### How to effectively use the solver for your own equations

I consider the solver model of the hp17bII - hp19bII families the best there is. It allows you to perform normal calculations, but you still have the possibility of entering data at any time in on of the variables.

When using the HP48-hp50 family of calculators, this is one of the missing features for my daily operation. So I began exploring alternatives to mimic the behavior of the solver I love the most.

The typical solver in the HP50g is very useful and gives a lot of information: a screen with all the fields of the formula with their current values. However, it does not allow you to continue with your calculations, and just use the solver keys when needed, like the 17bII.

In the reference manual, there are information about many hidden menus. One of them is MENU 75. It goes to a submenu where there are some solver related options.