At $\text{30°C,}$ the solubility of ${\text{Ag}}_{\text{2}}{\text{CO}}_{\text{3}}$$\left({\text{K}}_{\text{sp}}{\text{= 8×10}}^{\text{–12}}\right)$ would be maximum in 1 litre of

So, in pressence of NH₃, Ag⁺ ion concentration in the equilibrium is reduced, hence according to Le-chatelier principle, solubility is increased