Question

x+y = 4,2x+ky=3 find the value of k​

Answer 1

Step-by-step explanation:

x= 4-y..

so 2x+ky=3

2(4-y)+ky=3

8-2y+ky=3

-2y+ky=3-8

-2y+ky=-5

ky. = -5+2y

k. =. -5+2y. divided by y....

Answer 2

Answer:

k=8

Step-by-step explanation:

(x+y=4)×2

2x+ky=3

..

2x+2y=8

2x+ky=3

-. -. -

..................

2y-ky=5

y(2-k)=5

y=5/(2-k)

now,x+5/2-k=4

2x-2k+5=4

2x=4-5+2k

x=-1+2k/2

again....

x+y=4

2k-1/2+5/2-k

k=8