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n in (-oo:+oo)
n/0.36 = 0.75/0.9 // - 0.75/0.9
n/0.36-(0.75/0.9) = 0
n/0.36-0.83333333 = 0
2.77777778*n-0.83333333 = 0 // + 0.83333333
2.77777778*n = 0.83333333 // : 2.77777778
n = 0.83333333/2.77777778
n = 0.3
n = 0.3
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