diff --git a/EquationSolver/Form1.cs b/EquationSolver/Form1.cs
index f2453d7..3dc4833 100644
--- a/EquationSolver/Form1.cs
+++ b/EquationSolver/Form1.cs
@@ -121,11 +121,11 @@ private void Valider_Click(object sender, EventArgs e)
 
                     if (string.IsNullOrEmpty(answer.Text))
                     {
-                        answer.Text = "Calcul impossible";
+                        answer.Text += "Calcul impossible";
                     }
                     else
                     {
-                        answer.Text = "\r\nCalcul impossible";
+                        answer.Text += "\r\nCalcul impossible";
                     }
 
                     return;
@@ -136,10 +136,10 @@ private void Valider_Click(object sender, EventArgs e)
                 {
                     if (string.IsNullOrEmpty(answer.Text))
                     {
-                        answer.Text = "Calcul impossible";
+                        answer.Text += "Calcul impossible";
                     } else
                     {
-                        answer.Text = "\r\nCalcul impossible";
+                        answer.Text += "\r\nCalcul impossible";
                     }
 
                     string message = "Le calcul pour la valeur de Y est impossible !";