2d-1=9

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Solution for 2d-1=9 equation: 


d in (-oo:+oo)

2*d-1 = 9 // - 9

2*d-9-1 = 0

2*d-10 = 0 // + 10

2*d = 10 // : 2

d = 10/2

d = 5

d = 5

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