I have to make a program for two equations for someone. I am just really lost about what language to use and what type of program it should be. Any ideas would be welcome!

Python

The cheapest and easiest thing to work on any desktop is just an HTML file with embedded JavaScript

Excel

I second @netikras, why not just use excel if it's just to solve two equations for variable inputs? Looks like exactly what it was designed to do

@Hazarth She specifically wants me to write a program...

Visual basic

@BlueNutterfly is a GUI required or can it be done via CLI?

if you do need a GUI you're gonna have a better time quickly throwing something together in HTML/CSS/JS. Just add a couple of text fields and buttons and you're good to go, will work on any platform

If it can be done using CLI, then go with Python or Perl, you. You'll be done in probably in less than 10 lines of code including taking the user input. Will work on both windows and linux

Alternatively, if you want a GUI but also to use a high level language and don't mind being limited to Windows only then a good choice would be to use C# or VisualBasic, but you need to use the VisualStudio editor (not Visual Studio Code). There you can create a new Forms application which allows you to also design a standard windows application with input fields, buttons etc... You can probably do it with VSC, but VisualStudio would be fastest, already pre-set for this and quite intuitive.

c;mon guys, keep it simple, javascript will be just fine