<PRE><B>Question 1058969</B>
What concentration of acid material?


&lt;a href=&quot;https://www.algebra.com/my/Mixtures%3A-All-in-Symbols.lesson?content_action=show_dev&quot;&gt;twopart mixture, both parts unknown&lt;/a&gt;


&lt;a href=&quot;https://www.algebra.com/my/Two-Part-Mixture-with-one-material-quantity-unknown.lesson?content_action=show_dev&quot;&gt;twopart mixture, one part known other part unknown&lt;/a&gt;


&lt;a href=&quot;&quot;&gt;&lt;/a&gt;</PRE>