-7-3d=-31

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Solution for -7-3d=-31 equation: 


d in (-oo:+oo)

-(3*d)-7 = -31 // + 31

31-(3*d)-7 = 0

31-3*d-7 = 0

24-3*d = 0 // - 24

-3*d = -24 // : -3

d = -24/(-3)

d = 8

d = 8

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