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diff --git a/src/content/chapter0_basics/lesson09_assignments/code.gleam b/src/content/chapter0_basics/lesson09_assignments/code.gleam
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+++ b/src/content/chapter0_basics/lesson09_assignments/code.gleam
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+import gleam/io
+
+pub fn main() {
+  let x = "Original"
+  io.debug(x)
+
+  // Assign `y` to the value of `x`
+  let y = x
+  io.debug(y)
+
+  // Assign `x` to a new value
+  let x = "New"
+  io.debug(x)
+
+  // The `y` still refers to the original value
+  io.debug(y)
+}
diff --git a/src/content/chapter0_basics/lesson09_assignments/text.html b/src/content/chapter0_basics/lesson09_assignments/text.html
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+<p>
+  A value can be assigned to a variable using <code>let</code>.
+</p>
+<p>
+  Variable names can be reused by later let bindings, but the values they
+  reference are immutable, so the values themselves are not changed or mutated
+  in any way.
+</p>