Christian is twice as old as Brian. In eight more years, Brian will be 40 years old. How old will Christian be in eight years? Give me reasons, before answering the question
If in eight years Brian will be 40 years old, he is currently 40 - 8 = 32 years old. Since Christian is twice as old as Brian, he is 2 * 32 = 64 years old. In 8 years, Christian will be 64 + 8 = 72 years old. So the final answer is 72.