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n in (-oo:+oo)
-4*n-n-(2/9) = -407/9 // + -407/9
-4*n-n-(2/9)-(-407/9) = 0
407/9-4*n-n-2/9 = 0
45-5*n = 0 // - 45
-5*n = -45 // : -5
n = -45/(-5)
n = 9
n = 9
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