Question

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Answer 1

X = 1
y = -4
xy = (1)(-4) = -4

answer
C) -4


double check:
y - 4  = 4x + 3y = -(9-x)
-4 - 4 = 4(1) + 3(-4) = -(9 - 1)
    - 8 =   -8              = -8