-6d-9=7d+4

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Solution for -6d-9=7d+4 equation: 


d in (-oo:+oo)

-6*d-9 = 7*d+4 // - 7*d+4

-6*d-(7*d)-9-4 = 0

-6*d-7*d-9-4 = 0

-13*d-13 = 0 // + 13

-13*d = 13 // : -13

d = 13/(-13)

d = -1

d = -1

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