Roughly speaking, this method: <a href="http:&#x2F;&#x2F;www.wikihow.com&#x2F;Balance-Chemical-Equations" rel="nofollow">http:&#x2F;&#x2F;www.wikihow.com&#x2F;Balance-Chemical-Equations</a><p>Showing work is required, and if work contains a matrix then they&#x27;d just mark it as zero.