Answer: Equilibrium shift to left, favoring the formation of reactants.
Step-by-step explanation:
Take the equation below as an instance
CaCO3(s) ⇌CaO(s) + CO2(g)
Once, concentration of the PRODUCTS,
CaO(s) and CO2(g) are increased, the equilibrium constant, K remains the same while the equilibrium position shift to the left, favoring the formation of reactant, CaCO3(s)