Three friends divided some bullets equally. After all of them shot 4 bullets the
total number of bullets remaining is equal to the bullets each had after division.

Find the original number divided.

Answer:

Let 3X be the number of bullets intially they had..
so after division each will have X bullets.
so after shooting 4 bullets .

X-4+X-4+X-4=X;
2X=12;
X=6;
so the initial number of bullets is 18