2/5-5/6d+3/7d=169/210

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Solution for 2/5-5/6d+3/7d=169/210 equation: 


d in (-oo:+oo)

(3/7)*d-((5/6)*d)+2/5 = 169/210 // - 169/210

(3/7)*d-((5/6)*d)+2/5-(169/210) = 0

(-5/6)*d+(3/7)*d+2/5-169/210 = 0

-17/42*d-17/42 = 0 // + 17/42

-17/42*d = 17/42 // : -17/42

d = 17/42/(-17/42)

d = -1

d = -1

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