Question

19. Solve by cross multiplication method :

(i) 3x = 2y = 12 and 4x – 5y = 16

(ii) 3x – 7y = 7 and 11x + 5y = 87​

Answer 1

Answer:

3x–2y=12

xy=12 is the answer

4x–5y=16

–1xy=16

15 is the answer

3x–7y=7

–4xy=7

7–4=3 is the answer

11x–5y=87

6=87

xy=87/6 is the answer