5-10-15-...-5n=5n(n-1)/2

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Solution for 5-10-15-...-5n=5n(n-1)/2 equation: 


c^(7/8) = 0

57.87 = (50/360)*x

9*ln(t^9)

(4/15)*x^18 = 0

(x-1)^2 = 0

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