Question

Andre came up with the following puzzle. “I am three years younger than my brother, and I am 2 years older than my sister. My mom's age is one less than three times my brother's age. When you add all our ages, you get 87. What are our ages?"

Answer 1

My age is 13

My brother's age is x+3= 13+3 = 16

My sister's age is x-2=13-2=11

My mother's age is 3(x+3)-1=3(13+3)-1=47