Question

Jo. The present age of a brother is 5 years more than that his sister. If the sum of
their present ages is 21 years, the present age of the sister is
(a) 8 years
(6) 13 years
(c) 14 years
(d) 7 years​

Answer 1

Step-by-step explanation:

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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

Answer 2

Answer:

Let the age of the sister be x.

So, age of the brother is  x + 5.

Sum of their present ages = 21.

Forming an equation:

x + 5 + x = 21.

2x = 21 - 5

2x = 16

Sister's age =

x = 16 / 2 = 8

Step-by-step explanation:

Option A)

Mark brainliest if helped!!

Tq dear frnd!!