x+y = 4,2x+ky=3 find the value of k
Answers
Answered by
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....
Answered by
1
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
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