Answer:
I think that the answer for you questions is:
(6 for x, and -29 for y)
although it's only satisfies one equation.
Explanation:
y = 2x + 7
y = -4x -5
1st equation:
-29 = 2(6) + 7
-29 = 12 + 7
-29 = 19
2nd equation:
-29 = -4(6) - 5
-29 = -24 - 5
-29 = -29