Question

Solve for ab = 9 + 1/3qa

Answer 1

In this question, we are required to change the subject of the formulae from b to a.

Our approach is to successfully manipulate the variables so as to have a on the one side isolated.

We have:

`\begin{gathered} b=9+(1)/(3)qa \\ We\text{ subtract 9 from both sides to get:} \\ b-9=(1)/(3)qa \\ \text{Next we multiply both sides by }(3)/(q)\text{ to get} \\ (3)/(q)(b-9)=a \end{gathered}`

This gives us a as:

`a=(3)/(q)(b-9)`