diff --git a/cadenas/src/main.rs b/cadenas/src/main.rs
index 51b033c..268624a 100644
--- a/cadenas/src/main.rs
+++ b/cadenas/src/main.rs
@@ -13,13 +13,13 @@ fn string1() {
 }
 
 fn string2() {
-    let mut renglon_final = String::new();
+    let mut _renglon_final = String::new();
 
     let cadena1 = "Tinchicus.com";
     let cadena2 = " es el ";
     let cadena3 = "mejor lugar para aprender";
 
-    renglon_final = format!("{}{}{}", cadena1, cadena2, cadena3);
+    _renglon_final = format!("{}{}{}", cadena1, cadena2, cadena3);
 
-    println!("{}", renglon_final);
+    println!("{}", _renglon_final);
 }
diff --git a/tuplas/src/main.rs b/tuplas/src/main.rs
index 83116f6..b3ef41d 100644
--- a/tuplas/src/main.rs
+++ b/tuplas/src/main.rs
@@ -13,9 +13,9 @@ fn main() {
 
     println!("{}", tup.0);
 
-    let mut cambiar = (1.1f32, 1);
+    let mut _cambiar = (1.1f32, 1);
     let aesto = (3.14f32, 6);
-    cambiar = aesto;
+    _cambiar = aesto;
 
     println!("{}", aesto.0);