Is this the problem?
If so, how have you tried to distribute so far? Do you know that dividing by a half is the same as multiplying by 2?
Start by dividing both sides by 4 and multiplying both sides by 3 to give:
I would go further, but I don't know whether this is the equation and nor do I know whether you've followed my working thus far. Can you provide any further contribution?
Edit: whoops, was beaten to it.