Assuming you mean...
4x-6y = 4
Solving by elimination, instead of substitution...
Put x and y on the same side of the second equation
-2x + 3y = -7
Multiply the bottom equation by 2
4x - 6y = 4
2(-2x + 3y) = 2(-7) => -4x +6y = -14
Add both equations together:
0 = -10
This is why I posted the comment about you reposting the question.