The equation is S = 5(r^2)t To simplify this equation in order to solve for t, one must isolate the variable t. Dividing both sides of the equation by 5(r^2) to leave t in the right side of the equation, the result would be:
S/5(r^2) = t Therefore [tex]t = \frac{S}{5 r^{2} } [/tex].