Answer:
D. (1,-1)
Step-by-step explanation:
The only answer choice that satisfies the first equation is (x, y) = (1, -1).
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Since you have an expression for y, you can solve the system using substitution:
-x -8(4x-5) = 7
-x -32x +40 = 7 . . .eliminate parentheses
-33x = -33 . . . . . . . subtract 40
x = 1 . . . . . . . . . . . . divide by -33 . . . . matches choices B and D
Then using the equation for y, we have ...
y = 4(1) -5 = -1 . . . . . matches choice D
The solution is (x, y) = (1, -1).
