Question

find the value of k such that the system of linear equations has unique solution:
2x + 3y =7 and kx + 9y = 15

Answer 1

2x+3y=7
kx+9y=15

cond for unique soln
a1/a2≠b1/b2
2/k≠3/9
2*9≠3*k
18≠3k
18/3≠k
6≠k