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n in (-oo:+oo)
5*(n+12) = (3/5)*(10*n+5) // - (3/5)*(10*n+5)
5*(n+12)-((3/5)*(10*n+5)) = 0
5*(n+12)+(-3/5)*(10*n+5) = 0
5*(n+12)-3/5*(10*n+5) = 0
5*(n+12)-3/5*(10*n+5) = 0
57-n = 0
57-n = 0
57-n = 0 // - 57
-n = -57 // * -1
n = 57
n = 57
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