C=2pr solve for r, divide both sides by 2p
r=C/(2p)
F=9c/5 +32 or more neatly
F=(9C+160)/5 now solve for c, multiply both sides by 5
5F=9C+160 subtract 160 from both sides
5F-160=9C divide both sides by 9
C=(5F-160)/9
S=8P/10 solve for P, multiply both sides by 10
8P=10S divide both sides by 8
P=10S/8=5S/4
...
P(1.48598E/P)(1.2266D/E)=D
I am confident that you can plug in the values :)
