Question

8) 7x + 2 y = 24
8x + 2 y = 30

Answer 1

Answer:x=6, y=-9

Explanation:

7x+2y=24.....(1)

8x+2y=30.....(2)

(2) minus (1) we have

8x-7x+2y-2y=30-24

X=6

Substitute x=6 in (1), we have

7x6+2y=24

42+2y=24

2y=24-42

2y=-18

Y= - 18/2

Y=-9