Question

for what value of k do the equation x+2y=4 and 3x+ky=12 represent coincident lines​

Answer 1

Answer:

Co incident lines mean lines which lie over each other.

so we can say that

3x+6y=12

3x+ky=12

So 3x+6y=3x+ky=12

So K=6

So when k=6 the lines are co incident

Answer 2

Answer:

since when we have coincident lines

we have a1/a2= b1/b2, c1/c2

so a1 and a2 are in form of 1/3

also c1 and c2 are in the form of 1/2

so the value of k would be 6

because 2/6 =1/3