X NO FURTHER A MYSTERY

Address for x; Peter is two times as old as his son. Twelve years in the past he was 4 occasions older than him. How outdated are they now?Getting the sq. root of x2 will cancel it out. So, take the sq. root of each side. You'll get x still left in excess of on 1 side and as well as or minus the square root of 16, four, on the other facet. Therefor