Chapter 14, Problem 52RQ

At $\text{25 °C, }{K}_{\text{c}}\text{= 360}$ for the reaction

$\text{AgCl}\left(s\right){\text{ + Br}}^{\text{-}}\left(aq\right)\stackrel{}{\rightleftharpoons }\text{ AgBr}\left(s\right){\text{ +Cl}}^{\text{-}}\left(aq\right)$

If solid $\text{AgCl}$ is added to a solution containing 0.10 M Br^-, what will be the equilibrium concentrations of ${\text{Br}}^{\text{-}}{\text{and Cl}}^{\text{-}}$ ?