1. ## Rearranging Formulae

Fellow mathematicians,

I've started a slighly advanced form of rearranging formulae in which the subject of the formulae occurs more than once. Basically i have been searching through all my mathematics books and browsing throughout the Internet for questions which may appear in my examination. For example,

1.Make P the subject of the formula. A = L(1/2P - L).Do i use the BIDMAS then leaving the bracket and multipy by 2?
2.Make t the subject of the formula. 3t - s = t(s- 6). For this i got t= ts^2/ 9
3.Make u the subject of the formula. s = ut + 1/2at^2

but i've found these ones which include more than 1 subject. I find these rather intimidating. How do i solve these?

4.Make y the subject of the formula. a = y + 1/ y
5.Make x the subject of the formula. q = x^2 + p/ x^2 - p
6.Make a the subject of the formula. a+b = c(a+c)

And just one last one:

1. Make p the subject of these:
a) p/p+y = y

Someone told me that this one is to do with inverse but i'm not entirely sure what he meant. The only time i've dealt with inverse was in trigonometry.