-3d-9=-45

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Solution for -3d-9=-45 equation: 


d in (-oo:+oo)

-3*d-9 = -45 // + 45

45-3*d-9 = 0

36-3*d = 0 // - 36

-3*d = -36 // : -3

d = -36/(-3)

d = 12

d = 12

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