Balance the chemical equation using the vector equation approach

Balance the chemical equation using the vector equation approach. Alka-Seltzer contains sodium bicarbonate (NaHCO3)and citric acid (H3C6H5O7). When a tablet is dissolved in water, the following reaction produces sodium citrate, water, and carbon dioxide (gas):
NaHCO3+H3C6H5O7→Na3C6H5O7+H2O+CO2