What do I do, I'm the HORRIBLE when it comes to math :'( I have a lot more of these but i need to learn how to do this.
1/a + 1/b = c for a
P= A/1+rt for r
I= kE/R for R
Start by removing the fractions (just multiply through by the denominators, as below):
Rearrange so that all terms involving 'a' are on one side of the equation:
Factor out an :
Divide through by the non-a factor:
Try the others yourself, it's the same principle! Post your working if you're still unable to continue.