Hich equation can pair with x-y=-2 to create a consistent and dependent systems?

We can simplify each equation and find the solution.
6x + 2y = 15 can't be simplified further.
- 8x - 3y = 2 can't be simplified further.
4x - 4y = 6 on simplification gives 2x - 2y = 3 or x - y = 3/2
But, it does not coincide with the given equation.
- 3x + 3y = 6 on simplification gives x - y = - 2 coincides with the given equation.
Hence, - 3x + 3y = 6 can pair with x - y = -2 to create a consistent and dependent system.
The equation that will create a consistent and dependent system is:
[tex]-3x+3y=6[/tex]
The system of equations is consistent and dependent ( i.e. it will lead to infinite many solutions) is when the two equations represent the same line.
i.e. the two equations are similar.
The equation that satisfies this condition is:
[tex]-3x+3y=6[/tex]
i.e. on dividing both side of the equation by 3 we get:
[tex]-x+y=2[/tex]
On multiplying both side of the equation by "-1" we get:
[tex]x-y=-2[/tex]
i.e. the two equations are similar.