Given the system of equations.
4x+y=8
6x-9y=12
Which of the options represents the resulting equation after an equivalent expression for y is substituted into the second equation?
6x - 9 (4x - 8) = 12
4x + 4x - 8 = 8
6 (4x - 8) - 9y = 12
6x - 9 (-4x + 8) = 12
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