I need help with solving this math problem too.

Question

Your brother is  your age. Your sister is 4 years older than your brother. Your sister is 9 years old. Write and solve an equation to find your age.

Answer 1

Let's treat b as your brother's age, y as your age, and s as your sister's age.

b = y

b + 4 = s

s = 9

Therefore, b + 4 = 9, so b = 5.

Since b = y, your age is also 5.