Question

The present age of a brother is 5 uears more than that his sister. if the sum of their present ages is 21 years , the present age of the sister is​

Answer 1

Answer:

here is your answer

Step-by-step explanation:

it is very easy and simple hope it is helpful

Answer 2

Answer:

Let the present age of sister's be 'x'

brother's age will be: ' x+5 ' years

sum of their present age is 21 years

equation will be:-

x+5+x= 21

2x+5 = 21

2x= 16

x= 16/2

x= 8

sister's age = 8 years

so, brother age will be=

8+5

13 years.

hence, Sister's age = 8 years

Brother's age is 13 years