<p>Does anyone know of resources that I can look up a specific problem I have(such a solving systems of equations) and have an in depth explanation. The act practice answer explanations are quite bridging things for me. I have a math tutor and he does a decent job, but when I try to study on my own, I just can't gain that depth of understanding.</p>
<p>I have a goal of making a 31 on the ACT, but it's not looking so good right now.</p>