3d-5-7d=-1

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Solution for 3d-5-7d=-1 equation: 


d in (-oo:+oo)

3*d-(7*d)-5 = -1 // + 1

3*d-(7*d)-5+1 = 0

3*d-7*d-5+1 = 0

-4*d-4 = 0 // + 4

-4*d = 4 // : -4

d = 4/(-4)

d = -1

d = -1

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