What is

0.24x - 1.85 3.09 - 2.33x = 1.71

Was the variable "y" supposed to be part of this equation? If so, perhaps you meant to share the following:

0.24x - 1.85y = 3.09

- 2.33x = 1.71y

Plese, go back and reread the original question, and then ensure you have shared that question here precisely as it was presented.