What happens if more product is added to a system at equililbriem?

When more product is added to a system at equilibrium, the reaction will shift to the left, favoring the formation of reactants to restore equilibrium. This is in accordance with Le Chatelier's principle, which states that a system at equilibrium will adjust to counteract any changes imposed on it. As a result, the concentrations of the reactants will increase while the concentration of the product will decrease until a new equilibrium is established.