-2d-3=-66+7d

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Solution for -2d-3=-66+7d equation: 


d in (-oo:+oo)

-2*d-3 = 7*d-66 // - 7*d-66

66-2*d-(7*d)-3 = 0

66-2*d-7*d-3 = 0

63-9*d = 0 // - 63

-9*d = -63 // : -9

d = -63/(-9)

d = 7

d = 7

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