If y = 5 when x = –20, find x when y = 24 I can't figure out how this really works! Help!!!!

[latex]y_1=5\\ x_1=-20\\ y_2=24\\ x_2=?\\ \\ y_1 -> x_1\\ y_2 -> x_2\\ \\ 5 -> (-20)\\ 24->x_2\\ \\ 5x_2=-480\\ x_2=-120[/latex]