To determine an equation and make b the subject:
[tex]n+3Gb=qb[/tex][tex]\begin{gathered} n+3Gb=qb \\ \text{make b the subject of the formula} \\ 3Gb-qb=-n \\ b(3G-q)=-n \\ \text{divide both side by 3G-q} \end{gathered}[/tex][tex]\begin{gathered} b(3G-q)=-n \\ \frac{b(3G-q)}{3G-q}=-\frac{n}{3G-q} \\ b=\frac{-n}{3G-q} \end{gathered}[/tex]Hence the value of b in the above expresion is
[tex]b=\frac{-n}{3G-q}[/tex]
