Answer:
r = ps/(p-2)
Step-by-step explanation:
distribute the 'p' first to get:
pr-ps = 2r
add 'ps' to each side to get:
pr = 2r+ps
subtract '2r' from each side to get:
pr-2r = ps
factor out the 'r' to get:
r(p-2) = ps
divide each side by 'p-2' to get:
r = ps/(p-2)
