Who cracked the enigma code? and Who was the first person to break into Auschwitz? and what do both questions have in common?

1.) Alan Turing

2.) Denis Avey

3.) They both acted in WWII, They both have something to do with the Holocaust.

Explanation:

During the Second World War, Alan Turing worked at the Government Code and Cipher School at Bletchley Park, where he devised the techniques which cracked the German Enigma code.

The Man Who Broke into Auschwitz is the extraordinary true story of a British soldier who marched willingly into the concentration camp, Buna-Monowitz, known as Auschwitz III. In the summer of 1944, Denis Avey was being held in a British POW labour camp, E715, near Auschwitz III.

the perimeter of a triangle is 69 cm. side a is 5 cm shorter than side b. side c is twice as long as side a. find the length of each side. i need to know how to do it in 2 equations.  

equations:

a = b-5

c = 2a

a + b + c = 69