Question

The sum of ages of sunita and her brother is 8 years .Sunita is 7 years younger than her brother .Find her age​

Answer 1

Answer:

Present Age of Sunita=x

Present Age of Brother= y

ATQ:-

$1) \green{x + y = 8..(1)} \\ 2)x + 7 = y \\ \red{= > x - y = - 7..(2)}$

Add Eq.1 and 2:-

$\: 2x = 1 \\ \: \: \: \blue {\boxed{x = \frac{1}{2} }}$

Put in Eq.1:-

$\boxed{ \orange{y = \frac{15}{2} }}$

Answer 2

It is given that the sum of ages of Sunita and her brother is 8 years.

We have to find her age

Let her age be 'x' years

As per the given condition, Sunita is 7 years younger to her brother

So, her brother's age will be x+7 years

Now, x+7+ x = 8

         2x + 7 = 8

            2x = 8 - 7

                2x = 1

                   x = $\frac{1}{2}$

So, age of Sunita is $\frac{1}{2}$ years.