-3/7d+3/7=30/49

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Solution for -3/7d+3/7=30/49 equation: 


d in (-oo:+oo)

(-3/7)*d+3/7 = 30/49 // - 30/49

(-3/7)*d+3/7-(30/49) = 0

(-3/7)*d+3/7-30/49 = 0

-3/7*d-9/49 = 0 // + 9/49

-3/7*d = 9/49 // : -3/7

d = 9/49/(-3/7)

d = -3/7

d = -3/7

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