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n in (-oo:+oo)

(1/3)*n-(2/9) = 0

(1/3)*n-2/9 = 0

1/3*n-2/9 = 0 // + 2/9

1/3*n = 2/9 // : 1/3

n = 2/9/1/3

n = 2/3

n = 2/3

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