Question

please solve this question​

Answer 1

Step-by-step explanation:

Solve for x and y :

Let xy = a

5a = x + y ……(1)

7a = x – y ……(2)

Add (1) and (2)

7a + 5a = x – y + x + y

12a = 2x ÷ 2

6a = x

6xy = x (because a = xy)

6y = 1

Put value of y in (2)

7xy = x – y

7x = 6x – 1

7x – 6x = – 1

x = – 1