Question

the present age of brother is 5 years more than of his sister. if the sum of their present age is 21 years, the present age of the sister is??​

Answer 1

Answer:

the age of sister is 8 years and of brother is 13 years

Answer 2

Answer:

answer : sister age =8 years and brother age = 13

Step-by-step explanation:

let sister age :x

brother age:x+5

sum of their age :21

then,x+x+5=21

x+x=21-5

2x=16

x=16÷2

x=8..

sister age : 8 years

brother age: 8 +5 :13 years