ti-84

<p>does it have equation solver like ti-89?</p>

<p>There should be an app on it that does that.</p>

<p>If not, you can download an app from a website like <a href="http://www.ticalc.org%5B/url%5D"&gt;www.ticalc.org&lt;/a&gt;.&lt;/p>