class_docstr: An equation of the form "variable = expression",
  suitable for solving for one of the variables within the expression.
code: def __str__(self):
      return f"{self.left} = {self.right}"
  
imports: import random
label_desc: Use image node_id 4 for calling the Equation obj's underlying member method code with example usage: obj.__str__() and returns: self, str, self