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-4 + 4y = -40
4y = -40 + 4
4y = -36
y = -36 / 4
y = -9
Substitute y = -9 into the second equation:
-9 = 3x - 4
3x = -9 + 4
3x = -5
x = -5 / 3
Therefore, the solution is x = -5/3 and y = -9.