At a particular temperature, the following reaction has a Kc value of $7\mathrm{.}12.$

$2$ COF$2($g$)$ CO$2($g$)+$ CF$4($g$)$

If the reaction begins with $0\mathrm{.}150$ M COF$2,0\mathrm{.}730$ M CO$2$ and $0\mathrm{.}810$ M CF$4,$ calculate the concentration of CO$2$ at equilibrium. Enter your answer with no units.