Thread: Need help with this equation using reduction methods

Realized i've already asked this exact same question woops, mods delete please. Sorry.

Originally Posted by adam_leeds

For which values of

k are there no solutions, many solutions, or a unique solution to this
system?

x

− y = 1

3x − 3y = k

This is what i did

1 -1 | 1
3 -3 | k

Line 2 - (3 x line 1)

1 -1 | 1
0 0 |k-3

So k = 3 there are inifinte solutions
And when k doesnt = 3 there are no solutions

But what about one solution? Is there one?

i hope this is what you wrote :






there is no unique (one) solution because determinant is not different from zero








so to conclude ... (this is theory that you should know)

there is unique solution








and there is no solution



there is infinite many solutions