chore: import upstream snapshot with attribution

curriculum/challenges/english/blocks/basic-javascript/cf1111c1c11feddfaeb4bdef.md

@@ -0,0 +1,52 @@
+---
+id: cf1111c1c11feddfaeb4bdef
+title: Subtract One Number from Another with JavaScript
+challengeType: 1
+forumTopicId: 18314
+dashedName: subtract-one-number-from-another-with-javascript
+---
+
+# --description--
+
+We can also subtract one number from another.
+
+JavaScript uses the `-` symbol for subtraction.
+
+**Example**
+
+```js
+const myVar = 12 - 6;
+```
+
+`myVar` would have the value `6`.
+# --instructions--
+
+Change the `0` so the difference is `12`.
+
+# --hints--
+
+The variable `difference` should be equal to `12`.
+
+```js
+assert(difference === 12);
+```
+
+You should only subtract one number from `45`.
+
+```js
+assert(/difference=45-33;?/.test(__helpers.removeWhiteSpace(__helpers.removeJSComments(code))));
+```
+
+# --seed--
+
+## --seed-contents--
+
+```js
+const difference = 45 - 0;
+```
+
+# --solutions--
+
+```js
+const difference = 45 - 33;
+```