title: Does python have tools for solving a system of equations like Excel does?
body: <p>For example, I have the following system of equations (<strong>they can be non-linear</strong>):<br>
  A + B = C<br>
  C * D = E</p>
  
  <p>I want to enter some values for the variables (e.g. A = 1, B = 2, D = 3) and get the result for other variables (in this example, E = 9), and I can change the variables and instantly get the new result (e.g. I say A = 2, and I want to get E = 12 instantly)</p>