[tex]Let's\ use\ a\ simple\ math\ algebra; \\ \\ Formula; \\ \boxed{\boxed{y-z=x}} \\ \\ Let\ y=32,000 \\ Let\ x=20,000 \\ Let\ x\ be\ the\ number\ of\ apples\ needed \\ \\ 32,000-20,000=x \to \boxed{\boxed{12,000=x}} \\ \\ Hope\ it\ Helps:) \\ Domini[/tex]