A) Subtract A and C from both sides:
B = 180-A-C
B) Divide both sides by p and t:
r = i /pt
C) Divide both sides by PIh
r^2 = V/pih
Take the square root of both sides:
r = SQRT(V/pih)
D) Subtract ax from both sides:
by = c-ax
Divide both sides by b:
y = (c-ax)/b
