Specify [[$ a $]] and [[$ b $]] to execute the expression

[[$ \displaystyle\frac {a} {3} + \displaystyle\frac {b} {2} = \displaystyle\frac {2a} {3} - \displaystyle\frac {b} {6} = 7 $]].

Take a picture of your solution and return it to the submission folder.

Answer: [[$ a = $]] , [[$ b = $]]