Question

Solve t =p+3r/6 for r

Answer 1

Rearrange to isolate r on one side of the equation:

t =p+3r/6
t-p=3r/6
6*(t-p)=3r
[6*(t-p)]/3=r

Answer 2

Whats next?

Answer 3

that's it, you can't really do any more without more given information.