1=7/2d

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Solution for 1=7/2d equation: 


d in (-oo:+oo)

1 = (7/2)*d // - (7/2)*d

1-((7/2)*d) = 0

(-7/2)*d+1 = 0

1-7/2*d = 0 // - 1

-7/2*d = -1 // : -7/2

d = -1/(-7/2)

d = 2/7

d = 2/7

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