Answer
Equation D; the solution set of the equation is {$\frac{1}{3},7$}.
Work Step by Step
Equation D is directly set up for direct use of the zero factor property as it has already been factorized and all that remains is to equate the two factors to zero.
$(3x-1)(x-7)=0$
$(3x-1)=0$ or $(x-7)=0$
$x=\frac{1}{3}$ or $x=7$
Therefore, the solution set of the equation is {$\frac{1}{3},7$}