Question

For what value of 'K is the pair of linear equations x +2y=7and
3x-ky= 21 has infinitely many solutions?​

Answer 1

Answer:-6

Step-by-step explanation:a1/a2=b1/b2=c1/c2

So 1/3=2/-k=-7/-21

So k=-2×3=-6

Note:a1,a2 b1,b2 c1,c2 are the coefficients of x,y,and constant ters of the 2 linear equations