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(2/3)*x+1/9 = (-1/3)*x-(1/3) // - (-1/3)*x-(1/3)
(2/3)*x-((-1/3)*x)+1/9+1/3 = 0
(2/3)*x+(1/3)*x+1/9+1/3 = 0
x+4/9 = 0 // - 4/9
x = -4/9
x = -4/9
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