Multiply everything by 3 to cancel out the division by 3 on the left, and that should leave you with
a
>
3
⋅
−
4
or
a
>
−
12
.
(Dividing and multiplying are opposites, like adding and subtracting or integrating and differentiating. One does something, the other undoes it. If you want to get rid of a multiplication, divide it. If you want to get rid of an integration, differentiate it.)
