Question

Rohan is younger than Sohan by 5 years. The sum of their ages in 25 years. What is Rohan's age?​

Answer 1

Answer:

Rohan is 15 yrs old

Step-by-step explanation:

Then,

x+y=25 (1)

x=y+5 (2)

To isolate a variable we can do eq.(1) -eq.(2)

So,

(x+y)-x=25-(y+5)

Which simplifies to:

y=25-y-5

y=20-y

2y=20

y=10

We have found y, now we substitute y into any of the equations at the top.

For example, we use eq.(2)

x=y+5

x=(10)+5

x=15

Therefore, Rohit is 15 years old and his brother is 10 years old.

Answer 2

Answer:

20 years

explanation:

Rohan =x

x is younger than Sohan by 5 years

Sohan's age 25 -5

= 20

therefore rohan's age is 20