Question 579922
2x-3y=6 and 3y-2x=-6? 

2x -3y = 6
-2x+3y = -6    Adding the equations, they cancel each other out
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0 + 0 = 0 ; always true

They are not independent equations, they are the same equation, one is just multiplied by -1, so we cannot find a specific x,y solution.

To solve a system of linear equations w/ 2 unknown variables, you need two INDEPENDENT equations.
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*[invoke linear "x", "y", 2, -3, 6, -2, 3, -6 ]