-20/21=k-2/7

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Solution for -20/21=k-2/7 equation: 


k in (-oo:+oo)

-20/21 = k-(2/7) // - k-(2/7)

2/7-k-20/21 = 0

-k-2/3 = 0 // + 2/3

-k = 2/3 // * -1

k = -2/3

k = -2/3

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