Question

For what value of k will the pair of linear equations 2x + 6y = 7 and kx + 18y = 21 have infinitely many solutions ​

Answer 1

Answer:

if there is infinite solution

A1/A2=b1/b2= C1/C2

2/k=6/18=-7/-21

2/k =1/3=1/3

k= 2×3

k=6