In the balanced reaction between sodium borohydride and hydrochloric acid, bh4- + h+ + y h2o → x h3bo3 + z h2 (g) what is the value of the coefficient of water, y?

In the balanced reaction between sodium borohydride and hydrochloric acid, bh4- + h+ + y h2o → x h3bo3 + z h2 (g) what is the value of the coefficient of water, y?