Question

Find K if the equations x+3y=5
and 3x+ky=15 have infinitely many solutions

​

Answer 1

gm gentlemen .

here u are

x+3y=5 ------(1)

3x+ky=15-----2

now eq1×3

3x+9y=15 -----3

now subtracting eq3 and eq2

9-k=0

k = 9