Question

Hannah is 15 years old her sister is 6 years older than one third her age how old is Hannah

Answer 1

Her sister is 11 years old

Let Hannah age be x

let her sister age be y

since her sister age is 6 years older than one third of hannah age

mathematically,

y = 1/3 * x + 6

Recall that Hannah age is given as 15 from the question

y = 1/3 *15 + 6

1/3 * 15 = 5

y = 5 + 6

y = 11