I have the following equation:

t(t - x) = 3y(3y - x)

And I need to rearrange it to find x in the terms of y and t, in simplest form. (Assuming that 3y - t is not equal to 0).

Please could anyone be so kind as to show me how to get to the answer and more importantly, the workings...

I would also be highly appreciative if someone could point me to some online examples...

Thanks in advance, Mez