For what value of k the following system...

For what value of k the following system of simultaneous equation has a unique solution- 2kx + 3y + 3= 0 4x + y + 4= 0

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`a_1x+b_1y+c_1=0`
`a_2x+b_2y+c_2=0`
`a_1/a_1!=b_1/b_2` unique solution
`2k+3y+3=0`
`4x+y+4=0`
`(2k)/4!=3/1`
`2k!=12`
`k!=6`
...

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