Question

a girl is 8 years older than her younger sister. The sum of their ages is 64 years, what is her age in years​

Answer 1

let the age of elder sister = x+8

then let the age of younger sister be x

sum of their ages = 64

according to the question,

x+8+x = 64

2x+8 = 64

2x = 64-8

2x = 56

x = 56/ 2

x = 28

so, the age of younger sister is 28 years

and the age of elder sister is x+8= 28+8= 36years