31/2=2d+3d+1/2

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Solution for 31/2=2d+3d+1/2 equation: 


d in (-oo:+oo)

31/2 = 2*d+3*d+1/2 // - 2*d+3*d+1/2

31/2-(2*d)-(3*d)-(1/2) = 0

31/2-2*d-3*d-1/2 = 0

15-5*d = 0 // - 15

-5*d = -15 // : -5

d = -15/(-5)

d = 3

d = 3

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