Question

solve the equation ....... 11x + 15 y +23 =0 and 7x - 2y -20 =0​

Answer 1

Answer:

y=-3 and X=2 is the correct answer

Answer 2

Step-by-step explanation:

11x + 15y= -23..............(1)

7x - 2y=20................(2)

multiplying equation( 1) by 2 and (2) by 15

22x+30y=-46.........(3)

105x-30y=300.......(4)

Adding equation (3) and(4)

22x+30y= -46

+

105x-30y= 300

127x =254

x=254/127

x=2

put x=2 in equation (2)

7x- 2y= 20

7×2-2y=20

14-2y=20

-2y =20-14

-2y=6

-y=6/2

-y=3

y=-3

The solution is (x, y) =(2,-3)