When the product of three and a number is taken away from the sum of that number and six, the result is zero what is the number?

Need on this one asap im almost done with this subject

Una caja de galletas contiene 16 paquetes y cada una de estas tiene 12 galletas y se quieren repartir entre 6 niños ¿de cuantas galletas le toca a cada niño?

Ron has 8 caps and 4 of his caps are blue. thes rest of his cap are red. how many of ron's caps are red