2/7d-4/7=-31/42

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Solution for 2/7d-4/7=-31/42 equation: 


d in (-oo:+oo)

(2/7)*d-(4/7) = -31/42 // + -31/42

(2/7)*d-(4/7)-(-31/42) = 0

(2/7)*d-4/7+31/42 = 0

2/7*d+1/6 = 0 // - 1/6

2/7*d = -1/6 // : 2/7

d = -1/6/2/7

d = -7/12

d = -7/12

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