-7-3d=-9

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Solution for -7-3d=-9 equation: 


d in (-oo:+oo)

-(3*d)-7 = -9 // + 9

9-(3*d)-7 = 0

9-3*d-7 = 0

2-3*d = 0 // - 2

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

d = -2/(-3)

d = 2/3

d = 2/3

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