“God granted him to be a child the sixth part of his life, a twelfth part of her later covered his cheeks with hair; he lit the torch of marriage after a seventh and five years later he granted him a son. A late-born son, who fate took when he reached the age of half his father's life. He consoled his affliction with the science of numbers during the next four years after which his life was extinguished. ”
How many years did this illustrious mathematician live?
The answer is 84 years which is the result of solving the equation:
Simplifying you get: