Question

If the following system

-15x + 9y = -9
-25x + ky = -12

is consistent, then k is not equal to = ?

Answer 1

this user isn't trying to find x and y, if I am understanding the problem correctly. The user is trying to find what k is equal to, assuming that the following system of equations is consistent.

Answer 2

Yes, i am looking for k.

Answer 3

OK !
NOW LOOK !:
-15x + 9y = -9
-25x + ky = -12
-9/-12 = 3/4
Now do it :
3/4(-25x + ky = -12)
We have :
-75/4x + 3/4ky = -9
-75/4x + 3/4ky = -15x + 9y
(-75+60/4)x+3/4ky=9y
15/4x+3/4ky=9y
____________________________________
So we have 45x + ky = 9y
and in the end ky=9y/45x
Now get 9y/45x to ky .

Answer 4

-4/3?

Answer 5

So we have this system :
-15x+9y=-9
-20x + 9y / 45x = -12
Now can you answer to your self ?!:)
:D

Answer 6

12 is wrong. That's what i found first.

Answer 7

alright, i'll follow the other guy's step and i'll see. thank you