Infinitely many solutions
Work Step by Step
$y=3x-27$ $x-1/3y=9$ $-3*(x-1/3y=9)$ $-3x +y = -27$ $y=3x-27$ $-3x +y = -27$ $(3x-27)+(-3x+y) =y-27$ $3x-27-3x+y=y-27$ $y-27 = y-27$ (true for all real numbers)
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