Katie is buying souvenir gifts for her big family back home. She wants to buy everyone either a key chain or a magnet. The magnets are on sale for 50 cents each and the key chains cost key chains cost $1 each. She must purchase at least 24 gifts but has to spend less than $20. Let represent the number of magnets and represent the number of key chains. Model the scenario with a system of inequalities. Graph the system of inequalities and choose an appropriate solution for the scenario. Use complete sentences to prove why the solution is appropriate.
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