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n in (-oo:+oo)
(-4/9)*n = 3/2 // - 3/2
(-4/9)*n-(3/2) = 0
(-4/9)*n-3/2 = 0
-4/9*n-3/2 = 0 // + 3/2
-4/9*n = 3/2 // : -4/9
n = 3/2/(-4/9)
n = -27/8
n = -27/8
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