Question

(i) x = 3, y = 1 is a solution of 9x – 7y = 20.

(ii) x = 4, y = –1 is a solution of x – y = 5.

विकल्प

• Only (i)

• Only (ii)

• Both (i) and (ii)

• Neither (i) nor (ii)

Answer 1

Both (i) and (ii)

Explanation:

(i) Check if x = 3, y = 1 is a solution of 9x – 7y = 20: 

9(3) – 7(1)

= 27 – 7

= 20

Yes, it satisfies the equation.

(ii) Check if x = 4, y = –1 is a solution of x – y = 5: 

4 – (–1)

= 4 + 1 

= 5 

Yes, it satisfies the equation as well.

So, both (i) and (ii) are true.