18=d+1/2d+3

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Solution for 18=d+1/2d+3 equation: 


d in (-oo:+oo)

18 = d+(1/2)*d+3 // - d+(1/2)*d+3

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

(-1/2)*d-d-3+18 = 0

15-3/2*d = 0 // - 15

-3/2*d = -15 // : -3/2

d = -15/(-3/2)

d = 10

d = 10

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