Question

for what value of k the pair of linear equations x+2y+7=0 and 2x+ky-18=0 has unique solution​

Answer 1

Answer:

x+ 2y +7 =0

2x + ky -18 =0

For the unique solution

a1/a2 is not equal to b1/ b2

1/2 is not equal to 2/k

k can be 6 ,8