7=1/2d

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Solution for 7=1/2d equation: 


d in (-oo:+oo)

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

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

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

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

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

d = -7/(-1/2)

d = 14

d = 14

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