Joke Collection Website - Cold jokes - The elder brother said to the younger brother, "I think you were only 5 years old when you were now, and I am 31 years old now." What is the younger brother's age now?

The elder brother said to the younger brother, "I think you were only 5 years old when you were now, and I am 31 years old now." What is the younger brother's age now?

solution, suppose: my brother is now x years old

x-5=31-x

2 x=36

x=18

because it is the same as the elder brother's elder brother's growing age

, so the above equation is listed.