Question

if 3x-5y=9 and 5x-3y=7.find x+y.

plz tell appropriate answer​

Answer 1

Answer:

x + y = -1

Explanation:

3x - 5y = 9 ------(i)

5x - 3y = 7 ------(ii)

Adding both the equation we get:-

8x - 8y = 16

=> x - y = 2

Subtracting eqn (i) from eqn (ii) we get:-

2x + 2y = -2

=> x + y = -1

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