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n in (-oo:+oo)
n/50 = 38/100 // - 38/100
n/50-(38/100) = 0
n/50-19/50 = 0
1/50*n-19/50 = 0 // + 19/50
1/50*n = 19/50 // : 1/50
n = 19/50/1/50
n = 19
n = 19
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